top truck tool boxes
AIThis post was created with the assistance of artificial intelligence (AI).

When choosing a side mount truck bed tool box with locks, durability, security, and fit are key factors. The Heavy Duty Aluminum Underbody Truck Tool Box stands out as the best overall for its rugged build and secure locking system. For those prioritizing affordability, the 36 Inch Aluminum Side Mount Tool Box 2 Pack offers great value, while the Aluminum 48 Inch Side Mount Tool Box with Weather Resistant Seal provides superior weather protection. However, tradeoffs include weight, ease of installation, and price. Continue reading to explore these options in detail and find the best fit for your truck and budget.

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13
compared
7
brands
2
colors
Which side mount truck bed tool boxes with lock should you buy?
★ Top Pick
Heavy Duty Aluminum Underbody
Best Overall for Heavy-Duty Underbody Storage
Corrosion-resistant aluminum construction for long-term durability
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DIYers, contractors, or outdoor enthusiasts looking for a reliable, affordable side mount toolbox.
60 Inch Side Mount Truck Tool
Heavy-duty textured aluminum for corrosion resistance
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Full-size pickup owners working in wet climates needing secure, weatherproof side access.
Aluminum 48 Inch Side Mount To
Welded aluminum construction for durability
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Full-size pickup owners seeking quick, secure side access with a straightforward paddle lock system.
Aluminum 48 Inch Side Mount To
Abrasion-resistant aluminum finish for durability
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Small truck owners or those with limited bed space needing secure, weather-resistant storage.
Aluminum Side Mount Tool Box f
Lightweight, corrosion-resistant aluminum
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Pros & cons at a glance
Heavy Duty Aluminum Underbody
✓ Corrosion-resistant aluminum construction for long-term durability
✗ Heavy weight may require reinforced mounting brackets
60 Inch Side Mount Truck Tool
✓ Heavy-duty textured aluminum for corrosion resistance
✗ Smaller capacity than larger underbody models
Aluminum 48 Inch Side Mount To
✓ Welded aluminum construction for durability
✗ No internal compartments or organizational features
Aluminum 48 Inch Side Mount To
✓ Abrasion-resistant aluminum finish for durability
✗ No weatherproofing features specified
Aluminum Side Mount Tool Box f
✓ Lightweight, corrosion-resistant aluminum
✗ Limited internal capacity
60 Inch Side Mount Truck Tool
✓ Lightweight and durable aluminum construction
✗ Limited to a single large compartment, reducing internal organization
48 inch Aluminum Truck Bed Too
✓ Large capacity with upgraded dimensions
✗ May be heavy to carry or install without assistance
VEVOR Heavy Duty Aluminum Truc
✓ Durable and corrosion-resistant aluminum alloy
✗ Heavy when fully loaded, potentially difficult to move
Aluminum Plated Truck Tool Box
✓ Durable aluminum construction with corrosion resistance
✗ Heavy for some users during installation or relocation
36 Inch Side Mount Tool Box 2
✓ High-capacity 2-pack for extensive storage
✗ Heavy weight makes installation difficult
36 Inch Side Mount Tool Box 2
✓ Weatherproof aluminum construction resists rust and corrosion
✗ Limited to pickup trucks with compatible side rails
Spaross 36 Inch Aluminum Side
✓ Weather-resistant and rust-proof construction
✗ Limited to side mounting on bed rails
36 Inch Side Mount Truck Tool
✓ Heavy-duty aluminum construction for rugged use
✗ No internal compartments or padding

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Key Takeaways

  • Top picks balance durability, security, and ease of installation, with aluminum often preferred for weather resistance.
  • Size varies widely; selecting the right length depends on your truck bed dimensions and storage needs.
  • Locking mechanisms differ, with paddle locks and cam locks offering different levels of security and convenience.
  • Price correlates strongly with build quality and features, but higher cost doesn’t always mean better fit for every user.
  • Weather-resistant seals are a common feature in the best models, crucial for protecting tools from the elements.
2
60 Inch Side Mount Truck Tool
Best Value for Versatile Aluminum Side Mount Storage
1
Heavy Duty Aluminum Underbody
Best Overall for Heavy-Duty Underbody Storage
3
Aluminum 48 Inch Side Mount To
Best Weatherproof Side Mount for Full-Size Pickup

Our Top Side Mount Truck Bed Tool Boxes With Locks Picks

Heavy Duty Aluminum Underbody Truck Tool Box with Cam Lock, Double Barn Door, 48″×18″×18″ Side Mount for Trailer and Semi TruckHeavy Duty Aluminum Underbody Truck Tool Box with Cam Lock, Double Barn Door, 48"×18"×18" Side Mount for Trailer and Semi TruckBest Overall for Heavy-Duty Underbody StorageMaterial: AluminumDimensions: 48″L x 18″W x 18″HWeight: 50 poundsVIEW ON AMAZONSee Our Full Breakdown
60 Inch Side Mount Truck Tool Box Aluminum Pickup Truck Bed Tool Box Trailer Storage with Lock Key 5 Bar Tread 60″ x 8″ x 14″ Black60 Inch Side Mount Truck Tool Box Aluminum Pickup Truck Bed Tool Box Trailer Storage with Lock Key 5 Bar Tread 60" x 8" x 14" BlackBest Value for Versatile Aluminum Side Mount StorageMaterial: AluminumDimensions: 60″L x 8″W x 14″HWeight: Approx. 15.1 kgVIEW ON AMAZONSee Our Full Breakdown
Aluminum 48 Inch Side Mount Tool Box Black Pickup Truck Bed Storage with Weather Resistant Seal Lock & KeysAluminum 48 Inch Side Mount Tool Box Black Pickup Truck Bed Storage with Weather Resistant Seal Lock & KeysBest Weatherproof Side Mount for Full-Size PickupMaterial: AluminumDimensions: 48″L x 13″W x 13.4″HFits Bed Lengths: 6.5 ft to 8 ftVIEW ON AMAZONSee Our Full Breakdown
Aluminum 48 Inch Side Mount Tool Box Black Pickup Truck Bed Storage with Paddle LockAluminum 48 Inch Side Mount Tool Box Black Pickup Truck Bed Storage with Paddle LockBest Side Mount with Paddle Lock for Easy AccessMaterial: AluminumDimensions: 48 x 13.4 x 13 inchesFinish: Black powder-coatVIEW ON AMAZONSee Our Full Breakdown
Aluminum Side Mount Tool Box for Trucks with Paddle Latch (Silver, 34-Inch)Aluminum Side Mount Tool Box for Trucks with Paddle Latch (Silver, 34-Inch)Best Compact Side Mount for Space-Conscious UsersMaterial: Aluminum alloyDimensions: 34″L x 7.48″W x 15″HLid Opening: 90 degreesVIEW ON AMAZONSee Our Full Breakdown
60 Inch Side Mount Truck Tool Box, Aluminum, Silver60 Inch Side Mount Truck Tool Box, Aluminum, SilverBest Overall Side Mount Aluminum ToolboxMaterial: AluminumColor: SilverDimensions: 60″L x 13″W x 14″HVIEW ON AMAZONSee Our Full Breakdown
48 inch Aluminum Truck Bed Tool Box with Lock and Keys, Universal Fit for Pickup Trucks, Trailers, UTVs, and ATVs48 inch Aluminum Truck Bed Tool Box with Lock and Keys, Universal Fit for Pickup Trucks, Trailers, UTVs, and ATVsBest for Versatile, Large Capacity StorageDimensions: 48 x 15 x 15 inchesMaterial: 1.3 mm aluminumColor: BlackVIEW ON AMAZONSee Our Full Breakdown
VEVOR Heavy Duty Aluminum Truck Bed Tool Box, 39″x13″x10″, BlackVEVOR Heavy Duty Aluminum Truck Bed Tool Box, 39"x13"x10", BlackBest Heavy-Duty Weather-Resistant ChoiceMaterial: Aluminum alloyDimensions: 39 x 13 x 10 inchesColor: BlackVIEW ON AMAZONSee Our Full Breakdown
Aluminum Plated Truck Tool Box with Lock and Handles – 49″ x 15″ x 15″Aluminum Plated Truck Tool Box with Lock and Handles - 49" x 15" x 15"Best Weather-Resistant and Secure Aluminum BoxSize: 49″ x 15″ x 15″Material: AluminumFinish: Polished diamond treadVIEW ON AMAZONSee Our Full Breakdown
36 Inch Side Mount Tool Box 2 Pack, Steel Pickup Truck Storage with Lock and Keys36 Inch Side Mount Tool Box 2 Pack, Steel Pickup Truck Storage with Lock and KeysBest Heavy-Duty Steel Dual Pack for High CapacityDimensions: 36.8 x 12 x 12.5 inchesMaterial: SteelQuantity: 2 packVIEW ON AMAZONSee Our Full Breakdown
36 Inch Side Mount Tool Box 2 Pack, Aluminum Pickup Truck Storage with Lock and Keys36 Inch Side Mount Tool Box 2 Pack, Aluminum Pickup Truck Storage with Lock and KeysBest Value for Dual Lockable Aluminum StorageDimensions: 36″ x 12″ x 12″Material: AluminumNumber of Pack: 2VIEW ON AMAZONSee Our Full Breakdown
Spaross 36 Inch Aluminum Side Mount Tool Box for Pickup Trucks and TrailersSpaross 36 Inch Aluminum Side Mount Tool Box for Pickup Trucks and TrailersBest for Weather-Resistant, Secure Storage on Various VehiclesDimensions: 36″ x 12″ x 12″Material: Black powder-coated aluminumLock: Stainless steel with 2 spare keysVIEW ON AMAZONSee Our Full Breakdown
36 Inch Side Mount Truck Tool Box, Aluminum, Lockable, Black36 Inch Side Mount Truck Tool Box, Aluminum, Lockable, BlackBest for Heavy-Duty, Organized Storage with Gas Strut EaseDimensions: 36″ x 12″ x 12″Material: AluminumColor: BlackVIEW ON AMAZONSee Our Full Breakdown
Specs at a glance
side mount truck bed tool boxes with lockMaterialDimensionsColor
Heavy Duty Aluminum Underbody Aluminum48"L x 18"W x 18"H—
60 Inch Side Mount Truck Tool Aluminum60"L x 8"W x 14"H—
Aluminum 48 Inch Side Mount ToAluminum48"L x 13"W x 13.4"H—
Aluminum 48 Inch Side Mount ToAluminum48 x 13.4 x 13 inches—
Aluminum Side Mount Tool Box fAluminum alloy34"L x 7.48"W x 15"HSilver
60 Inch Side Mount Truck Tool Aluminum60"L x 13"W x 14"HSilver
48 inch Aluminum Truck Bed Too1.3 mm aluminum48 x 15 x 15 inchesBlack
VEVOR Heavy Duty Aluminum TrucAluminum alloy39 x 13 x 10 inchesBlack
Aluminum Plated Truck Tool BoxAluminum——
36 Inch Side Mount Tool Box 2 Steel36.8 x 12 x 12.5 inchesBlack
36 Inch Side Mount Tool Box 2 Aluminum36" x 12" x 12"Black
Spaross 36 Inch Aluminum Side Black powder-coated aluminum36" x 12" x 12"—
36 Inch Side Mount Truck Tool Aluminum36" x 12" x 12"Black

More Details on Our Top Picks

  1. Heavy Duty Aluminum Underbody Truck Tool Box with Cam Lock, Double Barn Door, 48″×18″×18″ Side Mount for Trailer and Semi Truck

    Heavy Duty Aluminum Underbody Truck Tool Box with Cam Lock, Double Barn Door, 48"×18"×18" Side Mount for Trailer and Semi Truck

    Best Overall for Heavy-Duty Underbody Storage

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    This underbody aluminum toolbox stands out for its exceptional durability and corrosion resistance, making it ideal for semi-truck operators who need reliable, long-lasting storage. Compared with the PRUNkuar 60 Inch Side Mount (Product 2), it offers a larger, more robust design suited for professional use, though its heavier weight requires sturdy mounting hardware. The cam lock adds a layer of security that’s compatible with padlocks, ideal for securing tools on trailer fleets. However, its bulkiness and limited color options might be less appealing for trucks with specific aesthetic or dimension constraints. This pick is perfect for fleet owners or commercial drivers who prioritize durability and security over installation flexibility or appearance. Heavy Duty Aluminum Underbody Toolbox excels in demanding environments but demands a more robust mounting setup due to its weight.

    Pros:
    • Corrosion-resistant aluminum construction for long-term durability
    • Secure cam lock compatible with padlocks for added safety
    • Barn door design allows easy side access without occupying bed space
    • Efficient underbody space utilization for large tool storage
    Cons:
    • Heavy weight may require reinforced mounting brackets
    • Limited color and finish options reduce aesthetic flexibility
    • Design may not fit trucks with unconventional dimensions

    Best for: Commercial truck operators and fleet managers needing durable, corrosion-resistant underbody storage.

    Not ideal for: Private truck owners seeking lightweight or more visually customizable options.

    • Material:Aluminum
    • Dimensions:48″L x 18″W x 18″H
    • Weight:50 pounds
    • Mounting Type:Side mount
    • Lock Type:Cam lock (padlock compatible)
    Our verdict
    “This model is best suited for heavy-duty, professional use where durability and security are top priorities.”
  2. 60 Inch Side Mount Truck Tool Box Aluminum Pickup Truck Bed Tool Box Trailer Storage with Lock Key 5 Bar Tread 60″ x 8″ x 14″ Black

    60 Inch Side Mount Truck Tool Box Aluminum Pickup Truck Bed Tool Box Trailer Storage with Lock Key 5 Bar Tread 60" x 8" x 14" Black

    Best Value for Versatile Aluminum Side Mount Storage

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    This 60-inch aluminum toolbox offers a compelling balance of durability and affordability, making it a solid choice for users needing extra space without a premium price. Its 5-bar tread textured surface enhances corrosion resistance and provides a slip-resistant exterior, comparable to the durability of the Heavy Duty Aluminum Underbody Toolbox, but in a smaller footprint suitable for various truck types. The lock with two keys provides reliable security, though its smaller size limits capacity compared to the larger, underbody variants. Compared to the Aluminum 48 Inch Side Mount (Product 3), it offers a longer length for extra tools but sacrifices some internal space. It’s ideal for contractors or outdoor enthusiasts who want a secure, weather-resistant box that fits different truck beds at an affordable price. Its tradeoff is a slightly reduced capacity and less internal organization features.

    Pros:
    • Heavy-duty textured aluminum for corrosion resistance
    • Lock and two keys for secure tool protection
    • Space-saving side mount design maximizes truck bed space
    • Versatile for trucks, RVs, trailers, and job sites
    Cons:
    • Smaller capacity than larger underbody models
    • Limited internal organization features
    • Design may be less suitable for trucks with unconventional dimensions

    Best for: DIYers, contractors, or outdoor enthusiasts looking for a reliable, affordable side mount toolbox.

    Not ideal for: Heavy-duty fleet operations requiring large-volume, professional-grade underbody storage.

    • Material:Aluminum
    • Dimensions:60″L x 8″W x 14″H
    • Weight:Approx. 15.1 kg
    • Lock Type:Keyed lock with 2 keys
    • Construction:5 bar tread textured aluminum
    Our verdict
    “This toolbox offers excellent value and versatility for users needing secure, weather-resistant storage at a reasonable price.”
  3. Aluminum 48 Inch Side Mount Tool Box Black Pickup Truck Bed Storage with Weather Resistant Seal Lock & Keys

    Aluminum 48 Inch Side Mount Tool Box Black Pickup Truck Bed Storage with Weather Resistant Seal Lock & Keys

    Best Weatherproof Side Mount for Full-Size Pickup

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    This 48-inch aluminum side mount box emphasizes weather resistance, with a sealed design that keeps tools dry in wet conditions. It fits full-size trucks from 6.5 to 8 feet, similar in size to the Heavy Duty Aluminum Underbody Toolbox, but with a focus on weatherproofing rather than underbody durability. Its welded aluminum construction and weather-resistant seal make it ideal for users who frequently work in damp or rainy environments. The lock and two keys ensure secure access. Compared with the PRUNkuar 60 Inch Toolbox, it offers a slightly smaller footprint but prioritizes weather protection over extra storage capacity. It’s perfect for contractors or farmers who need reliable, dry storage without occupying bed space, although it lacks internal compartments or detailed features. Its main tradeoff is the absence of internal organization and limited weight data, which may affect mounting choices.

    Pros:
    • Welded aluminum construction for durability
    • Weather-resistant seal keeps tools dry
    • Secure lock with keys for safety
    • Easy side access without occupying truck bed space
    Cons:
    • No internal compartments or organizational features
    • Weight not specified, complicating mounting decisions
    • Limited to full-size truck beds

    Best for: Full-size pickup owners working in wet climates needing secure, weatherproof side access.

    Not ideal for: Users seeking large internal capacity or internal organizational features.

    • Material:Aluminum
    • Dimensions:48″L x 13″W x 13.4″H
    • Fits Bed Lengths:6.5 ft to 8 ft
    • Lock Type:Keys
    • Water Resistance:Weather-resistant seal
    Our verdict
    “Ideal for those needing durable, weatherproof side access for tools on full-sized trucks in wet conditions.”
  4. Aluminum 48 Inch Side Mount Tool Box Black Pickup Truck Bed Storage with Paddle Lock

    Aluminum 48 Inch Side Mount Tool Box Black Pickup Truck Bed Storage with Paddle Lock

    Best Side Mount with Paddle Lock for Easy Access

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    This 48-inch aluminum truck box emphasizes quick, secure access with a paddle lock and push-button handle, making it suitable for users who prioritize ease of use. Its durable, abrasion-resistant finish and side mount design help maximize truck bed space while providing reliable security. Compared with the Heavy Duty Aluminum Underbody Toolbox, it offers easier access from the side rather than underneath, but lacks specific weatherproofing features, which may be a concern in wet climates. Its compatibility with full-size pickups and straightforward lock system makes it appealing for DIY users or fleet operators seeking a hassle-free, secure storage solution. The absence of detailed internal features or weather sealing is a tradeoff, limiting its suitability for wet environments or complex organization needs.

    Pros:
    • Abrasion-resistant aluminum finish for durability
    • Side access design saves bed space
    • Secure paddle lock with push-button handle
    • Compatibility with full-size pickup trucks
    Cons:
    • No weatherproofing features specified
    • Limited internal organization options
    • Potential installation challenges without detailed instructions

    Best for: Full-size pickup owners seeking quick, secure side access with a straightforward paddle lock system.

    Not ideal for: Users in heavy rain-prone areas or requiring internal compartments for organized tools.

    • Material:Aluminum
    • Dimensions:48 x 13.4 x 13 inches
    • Finish:Black powder-coat
    • Lock Type:Paddle lock
    • Compatibility:Full-size pickups
    Our verdict
    “This toolbox suits owners who want quick, secure side access but don’t require weather sealing or internal compartments.”
  5. Aluminum Side Mount Tool Box for Trucks with Paddle Latch (Silver, 34-Inch)

    Aluminum Side Mount Tool Box for Trucks with Paddle Latch (Silver, 34-Inch)

    Best Compact Side Mount for Space-Conscious Users

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    This 34-inch aluminum toolbox caters to truck owners needing a smaller, space-efficient storage solution. Its lightweight, corrosion-resistant aluminum makes it easy to install and handle, with a full 90-degree lid opening for easy tool access. Compared with larger models like the Heavy Duty Underbody Toolbox or the PRUNkuar 60 Inch, it sacrifices capacity for a compact footprint, making it ideal for smaller trucks or those with limited bed space. Its weather resistance and secure T-lock mechanism are suitable for protecting tools in various environments. However, its limited size and lack of internal compartments mean it’s less suited for users with extensive tool collections or organizational needs. This is best for owners who prioritize minimalism and ease of access over large storage capacity.

    Pros:
    • Lightweight, corrosion-resistant aluminum
    • Full 90-degree lid opening for easy access
    • Weather-resistant and secure T-lock
    • Compact size fits smaller trucks
    Cons:
    • Limited internal capacity
    • No internal compartments or organizational features
    • Specific to side rail mounting only

    Best for: Small truck owners or those with limited bed space needing secure, weather-resistant storage.

    Not ideal for: Professionals requiring large capacity or internal organizational features.

    • Material:Aluminum alloy
    • Dimensions:34″L x 7.48″W x 15″H
    • Lid Opening:90 degrees
    • Locking Mechanism:Stainless steel T-lock
    • Color:Silver
    Our verdict
    “Ideal for space-conscious owners needing secure, weather-resistant storage on smaller trucks.”
  6. 60 Inch Side Mount Truck Tool Box, Aluminum, Silver

    60 Inch Side Mount Truck Tool Box, Aluminum, Silver

    Best Overall Side Mount Aluminum Toolbox

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    This 60-inch aluminum side mount toolbox excels in balancing size, durability, and security. Its lightweight aluminum construction makes it easy to install and handle, unlike heavier steel options like the 36-inch steel pack but still offers strong weatherproofing. The single large compartment with a 90-degree opening simplifies access, making it ideal for those who prioritize quick tool retrieval. Compared with the VEVOR model, it provides ample space without overburdening the truck’s weight capacity. The tradeoff is its limited internal organization—no separate compartments—so users needing compartmentalization should look elsewhere. Overall, this pick makes the most sense for truck owners needing a sizable, weatherproof, and easy-to-access storage solution.

    Pros:
    • Lightweight and durable aluminum construction
    • Weatherproof and corrosion-resistant design
    • Secure lockable handle for theft prevention
    • Easy to load with 90-degree lid opening
    Cons:
    • Limited to a single large compartment, reducing internal organization
    • May require vehicle-specific fitting, complicating installation

    Best for: Professional contractors or fleet operators who need a large, secure, weatherproof storage option with minimal fuss.

    Not ideal for: Owners seeking multiple smaller compartments or detailed organization—this unit’s single large space limits internal sorting.

    • Material:Aluminum
    • Color:Silver
    • Dimensions:60″L x 13″W x 14″H
    • Weight:33 lbs
    • Number of Compartments:1
    • Style:Side Mount
    • Pattern:5 Bar Tread
    Our verdict
    “Ideal for those who need a large, weatherproof storage solution with straightforward access and security.”
  7. 48 inch Aluminum Truck Bed Tool Box with Lock and Keys, Universal Fit for Pickup Trucks, Trailers, UTVs, and ATVs

    48 inch Aluminum Truck Bed Tool Box with Lock and Keys, Universal Fit for Pickup Trucks, Trailers, UTVs, and ATVs

    Best for Versatile, Large Capacity Storage

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    This 48-inch aluminum toolbox offers a generous storage capacity, making it suitable for a range of outdoor and vehicle needs. Its lightweight aluminum construction rivals the 60-inch model in ease of handling, but with a slightly smaller footprint. The waterproof and rust-resistant surface ensures tools stay dry, comparable to the VEVOR model, but the multiple keys provide added security flexibility. Unlike the 60-inch option, its smaller size and design make it more adaptable for different vehicle types, including trailers and UTVs. The main tradeoff is weight—though lightweight, it can be heavy when fully loaded, which might pose challenges during installation or transport. This makes it a strong pick for users who require large capacity but value versatility and corrosion resistance.

    Pros:
    • Large capacity with upgraded dimensions
    • Lightweight yet durable aluminum construction
    • Waterproof and rust-resistant surface
    • Secure lock with two keys
    Cons:
    • May be heavy to carry or install without assistance
    • Limited color options restrict customization

    Best for: Outdoor enthusiasts or contractors needing a large, secure, and adaptable toolbox for various vehicles and conditions.

    Not ideal for: Those with limited cargo space or who prefer a smaller, more manageable storage box for everyday use.

    • Dimensions:48 x 15 x 15 inches
    • Material:1.3 mm aluminum
    • Color:Black
    • Locking mechanism:Stainless steel latch with keys
    Our verdict
    “Best suited for users who need ample, weatherproof storage across multiple vehicle types with added security features.”
  8. VEVOR Heavy Duty Aluminum Truck Bed Tool Box, 39″x13″x10″, Black

    VEVOR Heavy Duty Aluminum Truck Bed Tool Box, 39"x13"x10", Black

    Best Heavy-Duty Weather-Resistant Choice

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    The VEVOR 39-inch model stands out for its robust build and weatherproof features, making it ideal for demanding environments. Its aluminum alloy construction provides excellent corrosion resistance, comparable to both the 48-inch and 49-inch options, but with a smaller footprint better suited for trucks with limited space. The water-tight seal and gas strut lid ensure tools stay dry and accessible, while the stainless steel lock offers reliable security. Unlike the larger 60-inch box, this model prioritizes durability and weatherproofing over maximum capacity. The tradeoff is its smaller size, which limits storage space for bulkier tools or multiple users. Overall, this pick is best for users who need a tough, weatherproof solution that’s easy to access and secure in rugged conditions.

    Pros:
    • Durable and corrosion-resistant aluminum alloy
    • Waterproof seal and gas strut lid
    • Secure stainless steel lock with keys
    • Ergonomic side handles for carrying
    Cons:
    • Heavy when fully loaded, potentially difficult to move
    • Large for small trucks, may not fit all vehicle beds

    Best for: Tradespeople or outdoor workers requiring a durable, weatherproof, and compact tool box for demanding environments.

    Not ideal for: Users needing maximum storage capacity or a larger organizational space, as it’s more compact than some alternatives.

    • Material:Aluminum alloy
    • Dimensions:39 x 13 x 10 inches
    • Color:Black
    • Locking Mechanism:Stainless steel with keys
    • Features:Water-tight seal, gas strut lid, side handles
    Our verdict
    “Perfect for rugged, weather-prone conditions where durability and security outweigh large capacity.”
  9. Aluminum Plated Truck Tool Box with Lock and Handles – 49″ x 15″ x 15″

    Aluminum Plated Truck Tool Box with Lock and Handles - 49" x 15" x 15"

    Best Weather-Resistant and Secure Aluminum Box

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    This 49-inch aluminum toolbox combines size, security, and weather resistance effectively. Its polished diamond tread finish adds durability and a professional look, comparable to the 60-inch model but with a narrower profile. The stainless steel lock with keys enhances security, while side handles facilitate movement and installation. Compared to the 48-inch and 39-inch models, this box offers a larger internal volume without excessive weight, making it suitable for extensive tool collections. The downside lies in its weight—heavy for some users to install or move—and the limited color options mean it’s primarily suited for those who prefer a sleek metallic finish. It’s an excellent choice for users who need a weatherproof, secure, and sizable storage solution.

    Pros:
    • Durable aluminum construction with corrosion resistance
    • Weather-resistant with moisture-proof seals
    • Secure stainless steel lock with keys
    • Easy access via fold-up doors
    Cons:
    • Heavy for some users during installation or relocation
    • Limited color options, mostly silver finish

    Best for: Professionals or serious DIYers who require a large, weatherproof, and secure storage solution with a polished appearance.

    Not ideal for: Those seeking lightweight or highly portable options, as weight may be a concern during installation.

    • Size:49″ x 15″ x 15″
    • Material:Aluminum
    • Finish:Polished diamond tread
    • Lock:Stainless steel with keys
    • Handles:Side handles
    Our verdict
    “Ideal for users who prioritize size, security, and weather resistance in a professional-looking package.”
  10. 36 Inch Side Mount Tool Box 2 Pack, Steel Pickup Truck Storage with Lock and Keys

    36 Inch Side Mount Tool Box 2 Pack, Steel Pickup Truck Storage with Lock and Keys

    Best Heavy-Duty Steel Dual Pack for High Capacity

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    This 2-pack of steel 36-inch side mount tool boxes offers a high-capacity, durable storage solution designed for heavy-duty use. The steel construction provides superior strength compared to aluminum options, but at the cost of increased weight, which makes installation more challenging. The gas strut-assisted lids allow for smooth, one-handed access, and the weatherproof seals help protect tools from moisture, similar to the aluminum models. Compared with the aluminum 48-inch or 49-inch boxes, this steel set emphasizes toughness over weight savings, making it ideal for users who need maximum durability and security. However, the lack of included installation hardware and the extra weight may complicate setup, especially for DIY users. This product is best when durability and capacity are the main priorities.

    Pros:
    • High-capacity 2-pack for extensive storage
    • Heavy-duty steel construction for toughness
    • Weatherproof seals and gas strut lids
    • Secure lock and keys for theft prevention
    Cons:
    • Heavy weight makes installation difficult
    • No included mounting hardware or instructions

    Best for: Heavy-duty users or fleets needing a pair of extremely durable, high-capacity, weatherproof tool boxes for rugged environments.

    Not ideal for: Home users or those with limited installation experience, due to the lack of mounting accessories and the weight of steel.

    • Dimensions:36.8 x 12 x 12.5 inches
    • Material:Steel
    • Quantity:2 pack
    • Color:Black
    • Locking mechanism:Locks with keys
    Our verdict
    “Best suited for professional or fleet use where maximum durability and capacity outweigh ease of installation.”
  11. 36 Inch Side Mount Tool Box 2 Pack, Aluminum Pickup Truck Storage with Lock and Keys

    36 Inch Side Mount Tool Box 2 Pack, Aluminum Pickup Truck Storage with Lock and Keys

    Best Value for Dual Lockable Aluminum Storage

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    This set of two 36-inch aluminum side mount tool boxes stands out for offering excellent value by providing a pair of secure, weatherproof storage units at a competitive price. Compared to single-unit options like the 36 Inch Side Mount Truck Tool Box, Aluminum, Lockable, Black, this pack provides versatility for those needing multiple secure compartments. The lockable handles and aluminum construction ensure durability and security, but the design lacks internal organization features, which could be a drawback for users requiring detailed tool separation. Its weatherproof, lightweight build makes it ideal for users who prioritize simple, reliable storage without fuss over internal compartments.

    Pros:
    • Two lockable units offer better value and flexibility
    • Weatherproof aluminum construction resists rust and corrosion
    • Easy access with 90-degree lid opening
    Cons:
    • Limited to pickup trucks with compatible side rails
    • No internal organization or padding included
    • No mention of security alarm or advanced locking features

    Best for: Small fleet operators or DIY enthusiasts who need multiple lockable storage units at an affordable price.

    Not ideal for: Users seeking integrated internal compartments or specialized organization features, as this set focuses on basic storage.

    • Dimensions:36″ x 12″ x 12″
    • Material:Aluminum
    • Number of Pack:2
    • Lock:Yes
    • Color:Black
    • Mounting Style:Side mount
    Our verdict
    “This pack is ideal for budget-conscious buyers needing multiple secure storage boxes for basic tools and gear.”
  12. Spaross 36 Inch Aluminum Side Mount Tool Box for Pickup Trucks and Trailers

    Spaross 36 Inch Aluminum Side Mount Tool Box for Pickup Trucks and Trailers

    Best for Weather-Resistant, Secure Storage on Various Vehicles

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    The Spaross 36 Inch Aluminum Side Mount Tool Box excels in providing weather-resistant, rust-proof storage suitable for trucks, trailers, and RVs. Unlike the 36 Inch Side Mount Truck Tool Box, Aluminum, Lockable, Black which lacks a waterproof seal, Spaross’s waterproof gasket ensures tools stay dry even in wet conditions. It’s designed with a welded body and stainless steel lock with spare keys, offering robust security. However, its size may not fit all truck models, and it lacks internal organization features, making it less ideal for users who need compartmentalized storage. Its full-opening lid enhances accessibility, making it suitable for frequent tool access in harsh environments.

    Pros:
    • Weather-resistant and rust-proof construction
    • Secure anti-theft lock with spare keys
    • Full-opening lid for easy access
    Cons:
    • Limited to side mounting on bed rails
    • Size may not fit all truck or trailer models
    • No internal compartments or padding

    Best for: Truck owners or trailer users needing weatherproof, secure storage without internal compartments.

    Not ideal for: Those requiring internal tool organization or fitting smaller truck bed spaces should look elsewhere.

    • Dimensions:36″ x 12″ x 12″
    • Material:Black powder-coated aluminum
    • Lock:Stainless steel with 2 spare keys
    • Mounting:Side mount for bed rails
    • Weather Resistance:Waterproof seal
    • Durability:Welded body
    Our verdict
    “This toolbox is best suited for users prioritizing weatherproof security over internal organization or custom fit.”
  13. 36 Inch Side Mount Truck Tool Box, Aluminum, Lockable, Black

    36 Inch Side Mount Truck Tool Box, Aluminum, Lockable, Black

    Best for Heavy-Duty, Organized Storage with Gas Strut Ease

    View on Amazon

    The 36 Inch Side Mount Truck Tool Box, Aluminum, Lockable, Black combines rugged durability with user-friendly features like a gas strut lid for easy opening. Compared with the Spaross model, it emphasizes heavy-duty construction that withstands rough environments, making it ideal for demanding use cases. Its lockable design keeps tools secure, though it offers no internal compartments or padding, which could be a downside for those needing organized storage. The potentially heavy weight of the aluminum unit might be a concern for some users. Still, its sturdy build and gas strut make it a reliable choice for frequent access and tough conditions.

    Pros:
    • Heavy-duty aluminum construction for rugged use
    • Weatherproof seal resists water ingress
    • Gas strut facilitates effortless lid opening
    Cons:
    • No internal compartments or padding
    • Potentially heavy for some users
    • Limited to side mounting on existing truck rails

    Best for: Heavy-duty users who need durable, easy-to-access storage with a secure lock on their trucks.

    Not ideal for: Buyers seeking internal organization or lightweight options for occasional use should consider lighter or more compartmentalized models.

    • Dimensions:36″ x 12″ x 12″
    • Material:Aluminum
    • Color:Black
    • Lock:Yes
    • Mounting Style:Side mount
    • Opening Mechanism:Gas strut
    Our verdict
    “This pick is best for buyers needing a tough, easy-to-access lockable storage with minimal internal organization requirements.”
side mount truck bed tool boxes with locks
What makes a great side mount truck bed tool boxes with lock
1
Size and Fit
Measuring your truck bed before purchasing is essential to ensure the tool box fits snugly without interfering with other accessor
2
Material and Durability
Aluminum is popular for side mount tool boxes because it resists rust and is lightweight, making installation easier.
3
Locking Mechanisms
Security features vary from paddle locks to cam locks, each offering different levels of protection.
4
Weather Resistance and Seals
Since many users store valuable tools in their truck beds, weatherproofing becomes a priority.
How to choose your side mount truck bed tool boxes with lock
1
How we picked
These products were selected based on a combination of durability, security features, build quality, ease of installatio
2
Size and Fit
Measuring your truck bed before purchasing is essential to ensure the tool box fits snugly without interfering with othe
3
Material and Durability
Aluminum is popular for side mount tool boxes because it resists rust and is lightweight, making installation easier.
4
Locking Mechanisms
Security features vary from paddle locks to cam locks, each offering different levels of protection.
5
Weather Resistance and Seals
Since many users store valuable tools in their truck beds, weatherproofing becomes a priority.
Vetted side mount truck bed tool boxes with locks ·
The best side mount truck bed tool boxes with locks, compared
★ Winner Heavy Duty Aluminum Underbody
Best Overall for Heavy-Duty Underbody Storage
13compared
2colors

How We Picked

These products were selected based on a combination of durability, security features, build quality, ease of installation, and value for money. We prioritized models with proven locking mechanisms, weather resistance, and compatibility with a variety of trucks. Each product was evaluated for its design, material quality, and customer feedback. The ranking reflects a balance between premium features and affordability, aiming to help different types of buyers find the best option for their specific needs.

Factors to Consider When Choosing Side Mount Truck Bed Tool Boxes With Locks

Choosing the right side mount truck bed tool box with locks involves understanding several key factors. Size compatibility ensures the box fits your truck bed without obstructing access or overhanging. Material selection impacts durability and weather resistance—aluminum is lightweight and rust-resistant, steel offers strength but may be heavier. Locking mechanisms vary in security and ease of use; consider whether you need a paddle lock or a cam lock. Weather seals are essential if your tools need protection from rain, snow, or dust. Finally, installation complexity and price should align with your DIY skills and budget.

Size and Fit

Measuring your truck bed before purchasing is essential to ensure the tool box fits snugly without interfering with other accessories or access points. Larger boxes provide more storage but may be heavier and more difficult to install. Many models come in standard lengths like 36 or 48 inches, but some are adjustable or designed for specific truck makes. Choosing a size that balances capacity and compatibility will prevent the hassle of returns or modifications later.

Material and Durability

Aluminum is popular for side mount tool boxes because it resists rust and is lightweight, making installation easier. Steel offers superior strength but can corrode if not properly coated, so it might require more maintenance. Plastic models are generally less durable but may be more affordable. Think about your climate and usage frequency—if your tools are exposed to harsh weather, investing in weather-resistant aluminum or steel with protective coatings makes sense.

Locking Mechanisms

Security features vary from paddle locks to cam locks, each offering different levels of protection. Paddle locks are simple and easy to operate but may be less secure against theft, especially if not reinforced. Cam locks tend to be more robust and resistant to tampering, providing peace of mind for valuable tools. Consider whether you need keyed locks, combination locks, or keyless entry, based on your convenience preferences and security concerns.

Weather Resistance and Seals

Since many users store valuable tools in their truck beds, weatherproofing becomes a priority. Look for models with tight seals or gaskets that prevent water ingress, especially in regions with high precipitation. Aluminum boxes often have better inherent weather resistance, but seals enhance protection. Skimping on weatherproofing can lead to rust and damage over time, so prioritize this feature if your tools are exposed to the elements regularly.

Installation and Budget

Ease of installation varies; some models come with mounting brackets and straightforward instructions, while others may require additional hardware or modifications. If you’re less experienced, opting for a box with simple mounting options can save frustration. Budget-conscious buyers should balance cost against quality—paying more upfront for a durable, secure model often results in better long-term value. Remember, a poorly installed or cheap lock can compromise your tools’ security.

Frequently Asked Questions

Are side mount truck bed tool boxes with locks theft-proof?

While no lock is entirely theft-proof, high-quality side mount tool boxes with robust locking mechanisms significantly reduce the risk of theft. Models with cam locks and tamper-resistant features are more secure, but determined thieves may still attempt to pry them open. The best approach is to combine a secure lock with other security measures, like parking in well-lit areas or using additional locking devices.

Will a side mount tool box fit my truck bed?

Size compatibility depends on your truck’s specific dimensions. Most manufacturers provide detailed measurements, so measuring your truck bed’s length, width, and height before purchasing is vital. Some models are designed to be adjustable or come with mounting brackets compatible with various truck makes. Always verify the dimensions against your truck to ensure a proper fit and avoid installation issues.

Is aluminum better than steel for side mount tool boxes?

Aluminum is generally preferred for its lightweight and rust-resistant properties, which make installation easier and maintenance simpler. Steel, however, offers superior strength and can withstand more abuse, but it may corrode without proper coating. Your choice should consider your climate, security needs, and budget. For most truck owners seeking durability with less weight, aluminum strikes a good balance.

How important is weatherproofing in a side mount tool box?

Weatherproofing is critical if you store tools that can be damaged by moisture or if you live in an area with frequent rain or snow. Poorly sealed boxes can allow water, dust, and dirt inside, leading to rust and corrosion over time. Investing in models with gaskets or seals ensures your tools stay dry and protected, extending their lifespan and maintaining their value.

Can I install a side mount tool box myself, or do I need professional help?

Many side mount truck bed tool boxes are designed for DIY installation, with mounting brackets and straightforward instructions. If you have basic tools and mechanical skills, you can usually install them yourself. However, for larger or more complex models, or if you’re unsure about measurements and mounting, seeking professional help can ensure a secure fit and proper locking function, preventing future issues.

Conclusion

For most truck owners, the Heavy Duty Aluminum Underbody Truck Tool Box offers the best overall balance of durability, security, and ease of use. Budget-conscious buyers will appreciate the value in the 36 Inch Aluminum Side Mount Tool Box 2 Pack, which provides ample storage at a lower price. If premium features and weather resistance are priorities, the Aluminum 48 Inch Side Mount Tool Box with Weather Resistant Seal makes an excellent choice. Beginners or those with simple needs might prefer models with straightforward installation, while professionals handling valuable tools should consider heavy-duty steel or reinforced locks. Use your specific needs, budget, and truck size as your guide to selecting the ideal side mount tool box with locks in 2026.

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