A side mount truck bed toolbox is one of the easiest ways to add lockable storage without sacrificing too much bed space. It keeps tools organized, accessible, and protected from weather while staying out of the way of your cargo.
Below, we focus on practical options for different bed lengths, storage needs, and truck setups so you can quickly narrow down the right fit.
Best 10 Side Mount Truck Bed Toolbox Picks for 2026
Heavy-Duty Full-Size Storage
VEVOR 48-Inch Aluminum Truck Bed Tool Box
- 48 x 15 x 15 inch aluminum chest with 177-liter capacity
- Water-resistant seal and stainless steel lock with 2 keys
- Diamond tread finish with corrosion-resistant coating
Best For: Drivers who need large, rugged truck-bed storage
Space-Saving Side Rail Access
Aluminum Side Mount Tool Box, 34-Inch
- Mounts on the side rail to keep the bed open
- Lightweight aluminum with weather-resistant construction
- Lockable paddle latch and 90-degree lid opening
Best For: Buyers who want side access without losing bed space
Low-Profile Bed Rail Storage
Aluminum 36-Inch Side Mount Tool Box
- Bed-rail mounted design leaves more room in the truck bed
- Welded 0.058-inch aluminum tub for durable storage
- Lockable push-button handle for secure access
Best For: Users who want a lower-profile side storage box
Compact Workhorse Pick
36-Inch Side Mount Truck Tool Box
- 0.058-inch aluminum build with weatherproof sealing
- Side-mount design preserves truck-bed space
- Gas strut, lock, and keys support easy secure use
Best For: Truck owners who want compact secure side storage
Ultra-Long Side Storage
60 Inch Black Aluminum Side Mount Box
- 60-inch side mount design saves bed space.
- 5 bar tread aluminum resists corrosion.
- Lock and 2 keys add basic security.
Best For: long, secure side-access storage in work trucks and utility setups
Dual-Box Value Pick
36 Inch Side Mount Tool Box 2-Pack
- Two 36-inch boxes give flexible storage options.
- Welded aluminum build is lightweight and sturdy.
- Lockable handle includes two keys.
Best For: buyers wanting a two-box side-mount setup for compact, secure storage
Balanced Mid-Length Choice
- 48-inch size balances capacity and clearance.
- Gas spring lid helps with easy opening.
- Lockable, waterproof aluminum construction.
Best For: drivers wanting a mid-size, lockable side-mount box for everyday use
Compact Side Mount Truck Bed Toolbox
48-inch Aluminum Side Mount Toolbox
- 48-inch aluminum build with black powder coat
- Weather-resistant lid and seal ring design
- Lockable storage for truck, trailer, or RV use
Best For: Users needing a lighter, mid-size side-mount storage box
Space-Saving Side Mount Truck Bed Toolbox
36-inch Aluminum Side Mount Toolbox
- Smallest, most compact size at 36 inches
- Lightweight aluminum with corrosion-resistant build
- Lockable and weather-resistant for basic storage
Best For: Users needing a compact toolbox for tighter mounting spaces
Heavy-Duty Full-Size Storage – VEVOR 48-Inch Aluminum Truck Bed Tool Box
If you want a side mount truck bed toolbox with maximum capacity, this VEVOR aluminum chest is built for hauling more than just a few hand tools. The 48 x 15 x 15 inch body gives you room for maintenance gear, buckets, warning signs, and other truck essentials, while the diamond plate finish and coated aluminum help it stand up to everyday abuse.
Best For: Truck owners who need a large, water-resistant storage box for tools and jobsite gear.
Pros:
- Lightweight aluminum alloy construction with a diamond tread pattern and corrosion-resistant coating
- Large 177-liter capacity for bigger tools and assorted truck storage items
- Water-resistant overhanging door seal helps keep contents dry in wet conditions
- Stainless steel lock plus 2 keys adds basic theft protection
Cons:
- At 48 inches long, it is better suited to larger truck beds and storage needs
- Single-compartment layout may not help with item separation
- Side handles and gas strut add convenience, but this is still a sizable box to manage
Overall, this is a strong pick if your priority is durable, weather-resistant bulk storage rather than a compact organizer. It makes sense for drivers who want one rugged toolbox to handle a wide range of gear.
Space-Saving Side Rail Access – Aluminum Side Mount Tool Box, 34-Inch
This side mount truck bed toolbox is designed to stay out of the way while keeping your tools within easy reach. By mounting on the side rail, it preserves more open bed space for cargo, and the 34-inch aluminum body is a practical fit for organized storage without adding unnecessary bulk.
Best For: Truck owners who want quick side access to tools while keeping the bed open.
Pros:
- Side-rail mounting helps maximize usable truck-bed space
- Lightweight aluminum alloy construction is weather-resistant and corrosion-resistant
- Stainless steel lock and brass cylinder are designed to avoid rust
- Full 90-degree lid opening makes loading and unloading easier
Cons:
- 34-inch size is more compact than full-length toolbox options
- Single compartment limits internal organization
- Paddle latch design may be less familiar than a standard toolbox handle
For buyers who care more about convenient access and bed space than maximum volume, this is a sensible layout. It pairs a compact footprint with weather-ready materials and secure locking hardware.
Low-Profile Bed Rail Storage – Aluminum 36-Inch Side Mount Tool Box
If you are looking for a side mount truck bed toolbox that sits lower in the bed, this 36-inch aluminum model is built around side access and space efficiency. The welded 0.058-inch aluminum tub is designed for durability, while the bed-rail mounting keeps your truck bed more open for larger cargo.
Best For: Truck owners who want a lower-sitting side box with easy access from the truck side.
Pros:
- Side access design keeps valuable truck-bed space free
- Welded 0.058-inch aluminum construction adds strength
- Push-button handle offers lockable, convenient access
- Available in multiple lengths, including 36, 48, and 60 inches
Cons:
- Product notes do not specify interior organization features
- Single-compartment layout is simple rather than highly divided
- Limited feature details compared with some fuller-spec competitors
This is a straightforward choice for shoppers who want a durable side-mounted box without overcomplicating the setup. Its lower-riding design and lockable handle make it practical for everyday truck storage.
Compact Workhorse Pick – 36-Inch Side Mount Truck Tool Box
This side mount truck bed toolbox is aimed at buyers who want durable storage without giving up bed space. Built from 0.058-inch aluminum and sized at 36 x 12 x 12 inches, it offers a practical middle ground for tools, gear, and even camping supplies.
Best For: Truck owners who want a compact, lockable side box with smooth lid operation.
Pros:
- Heavy-duty 0.058-inch aluminum construction for durability
- Weatherproof seal line helps resist water intrusion
- Gas strut supports smooth opening and closing over time
- Lock and keyed latch add security for stored items
Cons:
- 36-inch footprint may still be too large for some smaller setups
- Single compartment does not provide item separation
- Basic black finish is functional rather than flashy
For shoppers who want a dependable side-mount box with simple operation, this model covers the essentials well. It focuses on durability, sealing, and security instead of extra features.
Ultra-Long Side Storage – 60 Inch Black Aluminum Side Mount Box
If you need a side mount truck bed toolbox that adds storage without eating up bed space, this 60-inch aluminum model is built around that exact use case. The side-mount layout makes tools easy to reach from the truck side, while the 5 bar tread aluminum construction is made to handle harsh weather and regular jobsite use.
Best For: Drivers who want a long, lockable side mount truck bed toolbox for maximum outside-access storage in trucks, trailers, RVs, or flatbeds.
Pros:
- Extra-long 60-inch design offers substantial storage capacity.
- Side mount setup keeps the truck bed more open for cargo.
- Textured aluminum with 5 bar tread is corrosion-resistant and durable.
- Built-in lock includes two keys for added security.
Cons:
- Large size may be more box than smaller trucks need.
- At 15.1 kg, it is not the lightest option to handle.
Overall, this box makes sense if your priority is long, secure, weather-resistant storage with easy side access. It is a practical choice for work trucks and utility setups where keeping the bed usable matters.
Dual-Box Value Pick – 36 Inch Side Mount Tool Box 2-Pack
This side mount truck bed toolbox package is aimed at buyers who want compact, direct-access storage on both sides or across multiple rigs. Each 36-inch aluminum box is designed to mount along the bed rail, helping you reach tools quickly while leaving more of the bed open for hauling.
Best For: Buyers looking for a two-box side mount truck bed toolbox setup with weather-resistant aluminum construction and keyed security.
Pros:
- Two-box pack offers flexible storage for more than one vehicle or side.
- Side rail mounting keeps the center of the bed freer for cargo.
- Welded 0.058-inch aluminum build is lightweight and sturdy.
- Lockable handle and two keys help secure tools.
Cons:
- 36-inch size is smaller than long single-box options.
- Pack format may be unnecessary if you only need one toolbox.
As a package deal, this option stands out for shoppers who need compact storage with straightforward access and weather-resistant construction. The 90-degree lid and lower-sitting design add convenience for everyday use.
Balanced Mid-Length Choice – 48 Inch Black Side Mount Box
For shoppers wanting a side mount truck bed toolbox that splits the difference between capacity and bed clearance, this 48-inch aluminum box is a strong middle-ground pick. It mounts on the truck bed rail for outside access, keeps the bed free, and uses a gas spring lid for smoother opening and closing.
Best For: Users who want a mid-size side mount truck bed toolbox with lockable storage, waterproof construction, and easy lid operation.
Pros:
- 48-inch length offers solid storage without going as large as a 60-inch box.
- Side-mount installation preserves full loading capability in the bed.
- Gas spring support helps the lid open and close smoothly.
- Stainless steel latches and two keys improve security.
Cons:
- Single-box design may not provide enough volume for larger tool loads.
- No extreme-duty claim beyond the aluminum, rust-resistant build.
This is a practical pick for everyday truck use when you want easy outside access and a cleaner bed layout. Its waterproof, lockable design makes it useful for tools and gear that need basic protection in transit.
Compact Side Mount Truck Bed Toolbox – 48-inch Aluminum Side Mount Toolbox
If you want a side mount truck bed toolbox that adds organized storage without a lot of extra weight, this 48-inch aluminum model is a practical fit. The powder-coated black finish, 5 bar tread pattern, and seal ring design make it a solid option for truck beds, trailers, campers, and RV rear storage.
Best For: Users who need a lighter, lockable side-mount box for general truck, trailer, or RV storage.
Pros:
- Aluminum construction is described as high-intensive, corrosion-resistant, and lightweight.
- Weather-resistant overlapping lid and seal ring design help limit leakage and keep contents cleaner.
- Lockable design includes a keyed lock and keys for securing stored items.
- 5 bar tread pattern adds durability to the black powder-coated exterior.
Cons:
- At 48 inches, it offers less capacity than the 60-inch version.
- Product details show a 2-piece listing, so buyers should confirm what is included.
This is a straightforward storage box for people who want a durable side-mount solution with weather protection and a lighter build. It suits everyday hauling needs where secure, simple storage matters more than maximum size.
Large Side Mount Truck Bed Toolbox – 60-inch Aluminum Side Mount Toolbox
This side mount truck bed toolbox is the largest option in the group, making it a good choice when you need more storage space on a truck, trailer, camper, or RV. It uses the same aluminum, weather-resistant construction as the smaller sizes, but its 60-inch length gives it the most room for larger or more frequent gear storage.
Best For: Buyers who want the most storage capacity in a side-mount aluminum box.
Pros:
- 60-inch length provides the most storage space of the three options.
- Aluminum construction is described as high-intensive, corrosion-resistant, and durable.
- Overlapping lid and seal ring design help reduce leakage and block rainwater.
- Lockable design with keyed lock and keys helps secure stored items.
Cons:
- Heavier than the smaller boxes at 84 pounds.
- Its larger size may be more than some truck beds or mounting setups need.
If storage capacity is the priority, this model stands out as the roomy choice. It keeps the same practical weather-resistant and lockable features while giving you the biggest footprint for hauling and organizing gear.
Space-Saving Side Mount Truck Bed Toolbox – 36-inch Aluminum Side Mount Toolbox
For tighter spaces, this side mount truck bed toolbox offers a smaller footprint without giving up the core features of the lineup. The 36-inch aluminum body is built for lightweight storage, with a powder-coated black finish, locking lid, and weather-resistant design for use in trucks, trailers, campers, and RVs.
Best For: People who need a compact side-mount toolbox for smaller storage areas.
Pros:
- Compact 36-inch size is easier to fit where space is limited.
- Lightweight aluminum build is described as corrosion-resistant and durable.
- Overlapping lid and seal ring design help protect contents from rainwater and debris.
- Lockable design adds security for stored tools and supplies.
Cons:
- Smaller dimensions mean less storage capacity than the 48-inch and 60-inch models.
- Like the others, it is listed as a 2-piece product, so buyers should verify package details.
This is the best pick when fit matters more than capacity. It keeps the same practical weather protection and secure storage features, but in a smaller format that works well for compact mounting situations.
How We Picked the Best Side Mount Truck Bed Toolbox
For this roundup, we prioritized fit, material quality, security, weather resistance, and everyday usability. A good Side Mount Truck Bed Toolbox should open smoothly, lock securely, and hold up to jobsite use, hauling, and changing weather.
We also looked at size variety, since the best choice depends on whether you need a compact box for basic hand tools or a larger model for bulkier gear and accessories.
Quick Comparison
Shorter boxes, such as 34- to 36-inch options, are better for smaller tool loads, tighter truck bed layouts, and buyers who want easier mounting. Mid-size 48-inch models offer a strong balance of capacity and convenience. Longer 60-inch boxes are best for users who need maximum storage and have the bed space to spare.
Pack options can make sense for crews, multi-vehicle setups, or buyers who want matched storage on both sides of a truck bed or trailer.
Key Buying Factors for a Side Mount Truck Bed Toolbox
Size and Bed Clearance
Measure your available bed length, rail clearance, and mounting area before buying. A box that is too long can interfere with wheel wells, tie-downs, or other cargo.
Material and Build
Most side mount boxes in this roundup use aluminum, which keeps weight down while still offering solid durability. Look for reinforced lids, reliable hinges, and thicker tread or diamond plate construction if you expect heavier use.
Security and Access
Lockable latches and included keys are essential if you store tools in public places or leave gear in the truck overnight. Paddle latches and side handles can also improve day-to-day access.
Weather Protection
Weather stripping and tight lid fit help reduce dust and water intrusion. If you work in wet, muddy, or dusty conditions, this matters more than cosmetic features.
Who Should Buy Which Side Mount Truck Bed Toolbox?
If you need a compact daily-driver setup, choose a 34- to 36-inch Side Mount Truck Bed Toolbox. If you want the best all-around storage balance, a 48-inch model is often the sweet spot. If your priority is maximum capacity for heavy tools, long gear, or trailer use, a 60-inch box is the better fit.
For buyers equipping multiple vehicles or matching storage on both sides, a two-pack can be the most efficient option. Ultimately, the right box is the one that fits your bed, protects your tools, and gives you fast access when you need it.