10 Best Side Mount Truck Bed Tool Boxes of 2026 for Secure, Space-Saving Storage

Side mount truck bed tool boxes are a smart way to add secure storage without sacrificing the center of your bed. They keep tools organized, protected, and easier to reach than bulky rear boxes.

In this roundup, we focus on practical options that balance size, build quality, weather resistance, and everyday usability for truck owners, contractors, and weekend haulers.

Best 10 Side Mount Truck Bed Tool Boxes Picks for 2026

Lo-Sider Reach – 60-Inch Side Access Aluminum Box

If you want side mount truck bed tool boxes that keep gear reachable without eating up cargo space, this 60-inch Lo-Sider style box is built for that job. The welded aluminum tub and truck-side access make it a practical choice for organized tool storage on work trucks and pickups.

Best For: Drivers who want a long, low-profile side box with easy truck-side access and lockable storage.

Pros:

• Truck-side access keeps tools reachable without taking over the bed.
• Welded 0.058-inch aluminum construction is built for everyday use.
• Push-button lock adds convenient security for stored items.
• Available in 36, 48, and 60-inch sizes for different setups.

Cons:

• Not water resistant, so it is not a fully sealed wet-weather solution.
• Large 60-inch size may not suit smaller bed layouts.

This is a straightforward side-mount box for buyers who value length, access, and a low-profile fit over extra frills. If your priority is keeping tools close at hand while preserving bed space, it fits the brief well.

Rail Mount Pro – 72-Inch Black Aluminum Topsider

For buyers comparing side mount truck bed tool boxes, this 72-inch topsider stands out for its larger capacity and dual-drop-door layout. The diamond tread aluminum build, rail-mounted design, and weather-resistant storage focus make it a strong fit for work trucks that need frequent access to tools.

Best For: Work trucks and utility setups that need a roomy, weather-resistant topsider with dual-door access.

Pros:

• .100-inch diamond tread aluminum construction is built for demanding use.
• Dual-drop doors make it easier to reach stored tools across the cabinet.
• Locking T-handles help secure contents from theft and weather.
• Includes mounting hardware and no-drill setup options with J-hooks and side-rail pads.

Cons:

• At 72 inches long, it needs enough rail length and clearance.
• Heavier than smaller side boxes at 78 pounds.

This is a better pick if you need more volume and a more professional topsider layout than a compact side box can offer. Its access and security features are well matched to frequent jobsite use.

Matte Black Compact – 48-Inch Side-Mount Tool Box

This compact option in the side mount truck bed tool boxes category is sized for smaller storage needs while still keeping tools within arm’s reach from the truck side. Its diamond tread aluminum body, weather-resistant seal, and lid support features make it a practical everyday box.

Best For: Buyers who want a smaller side-mount box with weather resistance and a simple, durable build.

Pros:

• Diamond tread aluminum construction is rust-resistant and durable.
• Complete weather-resistant seal helps keep out dirt and moisture.
• Premium shocks hold the lid open for easier access.
• Lightweight at 22.4 pounds for easier handling.

Cons:

• Single-compartment layout offers less organization than divided boxes.
• Smaller 48-inch size provides less total storage than larger topsiders.

This box makes sense if you want a simpler, lighter side-mount setup without giving up weather protection. It is a solid fit for tool storage where compact size matters more than maximum capacity.

Low-Rider Black – 36-Inch Side Mount Storage Box

If you need side mount truck bed tool boxes in a shorter footprint, this 36-inch model is designed to sit lower in the bed and still give you truck-side access. The welded aluminum construction and push-button locking handle keep the design focused on simple, practical storage.

Best For: Drivers who want a shorter, low-profile side box with secure access and minimal bed intrusion.

Pros:

• 36-inch length works well when bed space is limited.
• Side access keeps tools within reach from the truck side.
• Welded 0.058-inch aluminum tub adds durable construction.
• Push-button handle and included keys provide lockable storage.

Cons:

• Not water resistant, so it is not intended as a sealed wet-weather box.
• Shorter length means less storage than the 48- and 60-inch versions.

For smaller trucks or tighter setups, this is the most space-conscious option in the lineup. It keeps the same side-access idea as the larger versions while trimming the overall footprint.

Side-Mount Steel Workhorse – 34" Side Mount Truck Tool Box

If you want side mount truck bed tool boxes that keep the bed floor open, this steel model is built for easy outside access and everyday job-site use. Its rail-mounted design helps preserve hauling space, while the dual powder-coated finish and locking hardware add practical durability for regular outdoor exposure.

Best For: Pickup owners who need a rugged, side-access toolbox that leaves the bed clear for larger cargo.

Pros:

• Side mount design keeps the truck bed floor clear for hauling oversized items
• Heavy-duty steel body with dual powder coating for rust and corrosion resistance
• Stainless steel locking latch with two keys helps secure tools and reduce rattling
• Dual gas struts support smooth, one-handed lid opening and soft closing

Cons:

• Steel construction is heavier than aluminum alternatives
• At 34 inches long, it may be less spacious than larger side-mount boxes

Overall, this is a solid pick if you value durability, secure storage, and quick access from outside the truck. It focuses on practical utility rather than fancy extras, which makes it a dependable work-ready option.

Aluminum Space Saver – 36" Side Mount Truck Toolbox

This aluminum option is a practical choice among side mount truck bed tool boxes if you want extra storage without giving up bed space. The 36-inch size, weatherproof sealing, and side-rail mounting make it well suited for keeping tools organized and accessible while still leaving room for other gear.

Best For: Buyers who want a lightweight aluminum toolbox with solid weather resistance and easy lid operation.

Pros:

• Heavy-duty 0.058-inch aluminum construction for durability
• Weatherproof seal line helps resist water intrusion
• Side mount design leaves more room in the truck bed
• Gas strut opens the lid smoothly and allows 90-degree access

Cons:

• Only one compartment, so organization options are limited
• Smaller 12-inch height may not suit bulkier equipment

For shoppers who prioritize corrosion resistance and easier handling, this box checks the right boxes. It’s a straightforward storage upgrade that balances capacity, access, and weather protection without taking over the bed.

Long-Bed Side Carrier – 60" Aluminum Truck Tool Box

For buyers comparing side mount truck bed tool boxes with maximum length, this 60-inch aluminum model stands out for long, narrow storage. Its textured 5 bar tread, waterproof claim, and side-mount layout are aimed at users who need accessible storage for tools and accessories across trucks, trailers, RVs, and job sites.

Best For: People who need a long side-mounted toolbox for trucks, trailers, or multi-purpose utility storage.

Pros:

• 60-inch length offers generous storage in a slim side-mounted format
• Textured aluminum with 5 bar tread is built for corrosion resistance
• Lock and two keys provide basic secure storage
• Versatile enough for trucks, RVs, trailers, garages, and dump trucks

Cons:

• Narrow 8-inch width limits what you can store inside
• No gas struts are listed in the supplied details

This is a good fit if your priority is length and utility rather than bulky-volume storage. It’s a flexible toolbox that can work across multiple vehicles and setups, but its slim profile means it’s best for long tools and smaller gear.

Premium Extra-Long Storage – 60 Inch Side Mount Aluminum Truck Tool Box 2 Pack

If you need side mount truck bed tool boxes that maximize storage without eating up bed space, this 60-inch aluminum 2-pack is built for bigger hauling needs. The side-rail design keeps the boxes accessible from the truck side, while the 60″ x 13″ x 14″ footprint gives you room for tools, chains, planks, and even camping gear.

Best For: Truck owners who want extra-long, lockable side storage for tools and gear in a two-box setup.

Pros:

• Side mount design leaves more usable room in the truck bed.
• Heavy-duty 0.058-inch aluminum construction is built for durability.
• Weatherproof seal line helps resist water intrusion.
• Gas strut lid opens smoothly to 90 degrees for easier loading.

Cons:

• No mounting accessories are included.
• No instruction manual is included.

This is a strong fit if you need maximum-length storage and value the convenience of a lockable, lift-assist lid. The two-pack format makes it especially practical for organizing larger tool loads on both sides of the bed.

Compact Lower-Riding Pair – 48 Inch Side Mount Truck Tool Box 2 Pack

For buyers comparing side mount truck bed tool boxes, this 48-inch pair offers a shorter profile that still keeps tools accessible from the truck side. The lower-riding design and 48″ x 13″ x 12.8″ size make it a practical choice when you want organized storage without giving up more bed room than necessary.

Best For: Drivers who want a compact, lockable side-mount tool box set with easy side access.

Pros:

• Bed rail-mounted side access keeps tools reachable from outside the truck.
• One-piece welded 0.058-inch aluminum tub is lightweight and sturdy.
• Weatherproof, rust-resistant construction is made for long-term use.
• 90-degree lid opening makes loading and unloading simpler.

Cons:

• Smaller than the 60-inch option, so total storage is more limited.
• Only one compartment per box.

This model makes sense if you want a balanced mix of size, durability, and convenience. It is a straightforward pick for everyday tool storage where easy access matters as much as capacity.

Budget-Friendly Compact Pair – 36 Inch Side Mount Tool Box 2 Pack

This 36-inch option is the most compact of the side mount truck bed tool boxes in this lineup, making it a good fit when bed space is tight. The bed rail-mounted design lets you access tools from the truck side, while the 36″ x 12″ x 12″ size keeps the boxes lower and easier to work around.

Best For: Truck owners who want a smaller, lockable side-mount storage pair for lighter tool loads.

Pros:

• Compact 36-inch size is easier to fit in tighter truck beds.
• Welded 0.058-inch aluminum construction is lightweight and corrosion-resistant.
• Lockable stainless steel handle adds security.
• 90-degree lid opening supports easier access during loading.

Cons:

• Least storage capacity of the three options here.
• Only one compartment per box.

If your priority is side access and space savings over maximum capacity, this is the most compact practical choice. It works well for keeping essential tools organized without crowding the truck bed.

How We Picked the Best Side Mount Truck Bed Tool Boxes

We compared size options, material quality, latch and lock design, weather sealing, and how well each box should fit real-world truck bed use. We also looked for models that offer a useful mix of storage depth and side access, since Side Mount Truck Bed Tool Boxes should make gear easier to reach, not harder.

Preference went to aluminum construction, reinforced lids, corrosion resistance, and designs that can handle frequent opening, rough roads, and changing weather.

Quick Comparison

Shorter boxes are better for lighter loads, compact beds, and keeping more open cargo space. Longer 48-inch and 60-inch models typically suit users who carry more tools or want better length-to-capacity balance. Wider boxes and two-pack options can be a strong fit for work trucks, RV setups, or users separating tools by category.

Key Buying Factors for Side Mount Truck Bed Tool Boxes

Truck Bed Fit and Mounting Space

Measure the bed rail height, available side clearance, and any accessories already mounted on the truck. The box should sit securely without interfering with tonneau covers, tie-downs, wheel wells, or stake pockets.

Material and Weather Resistance

Aluminum is the most common choice because it stays relatively light and resists rust. Look for weather stripping, tight lid closure, and a reinforced design if you expect frequent rain, dust, or jobsite exposure.

Capacity Versus Accessibility

Biggest is not always best. A box that is too deep or too long can be harder to reach and may reduce usable bed space. Choose a size that matches the tools you carry most often.

Security and Everyday Convenience

Lockable latches, included keys, and easy-open lids matter if you store expensive tools. Check that the latch feels solid and that you can open the box comfortably from the truck side.

Who Should Buy Which Side Mount Truck Bed Tool Boxes?

If you want a compact storage solution for hand tools and small gear, a 34-inch or 36-inch model is a practical choice. If you need more all-purpose capacity for contractor use, 48-inch and 60-inch boxes are usually the better fit. Buyers who want maximum storage or separated compartments should consider the two-pack options, while users prioritizing premium fit and brand reputation may prefer established names like Buyers Products.

For most shoppers, the best choice comes down to truck size, available mounting space, and how often you need quick access to tools during the day.