Best Side Tool Box For Pickup: Compare 9 Side-Mount Models

#1 · Best Overall

1. UWS EC30363

• Dimensions: 36"L x 36"W x 36"H
• Material: Aluminum
• Weight: 27.2 lb

Best for: Low-profile lid strength.

Why it ranks #1: Its 36-inch side-mount design uses extra-thick aluminum, a foam-filled RigidCore lid, a stainless steel push-button lock, and a MicroSeal gasket.

UWS’s foam-filled RigidCore lid is the defining feature of this 36-inch side box, helping prevent binding while adding lid strength. Its low-profile shape creates a streamlined look beside compatible low-profile crossbed boxes, and the rail-top placement keeps tools within reach while leaving the cargo area clearer.

The solid-foam-filled RigidCore lid is intended to resist binding, so repeated access is less to be interrupted by lid alignment issues. Extra-thick diamond-plate aluminum adds structural integrity, while a MicroSeal gasket helps keep dust, debris, and moisture away from tools. The box mounts along the inside of the bed rails for accessible storage without filling the central cargo area. Its stainless-steel push-button locking system adds a defined way to secure stored gear.

Skip it if you need a taller 15-inch storage profile; ZUCIVI’s 34-inch side-mount box lists 15 inches of height.

This fits pickup owners seeking a low-profile aluminum side box with a reinforced lid and sealed storage for tools. Its lower lid suits streamlined bed setups, but buyers needing maximum vertical room should compare the box height with their equipment.

Listed on Amazon as: UWS EC30363 36-Inch Matte Black Heavy-Wall Aluminum Truck Side Tool Box with Low Profile, RigidCore Lid

#2 · Weather-Sealed Aluminum

2. Northern Tool Side-Mount Box

• Dimensions: 48"L x 11.5"W x 11"H
• Material: Aluminum
• Weight: 22.4 lb

Best for: Sealed aluminum rail storage.

Why it ranks #2: This 48-inch aluminum box has a weather-resistant lid seal, a reinforced lid brace, and premium shocks to hold the lid open.

A weather-resistant lid seal is the defining feature of Northern Tool & Equipment’s 48-inch side-mount box, helping keep dirt and moisture away from stored gear. Its diamond-treadplate aluminum body sits atop the bed rails, so tools stay accessible without occupying as much central bed space.

The complete weather-resistant seal around the lid helps shield contents from dirt and moisture, while a metal-reinforced lid brace adds support during repeated opening. Premium shocks hold the lid open, making it easier to reach tools while both hands are occupied. At 48 by 11.5 by 11 inches, the box offers a long, relatively narrow storage footprint; its aluminum construction keeps the listed material distinct from steel alternatives, and the locking pull handle secures the contents.

Skip it if you need a taller 15-inch box; ZUCIVI’s 34-inch side-mount model lists that height.

Choose this for truck owners who want long, rail-top aluminum storage with a supported open lid and a weather-resistant seal. Its 11-inch height and 48-inch length are the key dimensions to weigh against your cargo and rail layout.

Listed on Amazon as: Northern Tool Side-Mount Truck Tool Box, 48in. x 11.5in. x 11in.

#3 · Silver Finish

3. PRUNkuar 48-Inch Silver

• Dimensions: 48"L x 12.5"W x 13"H
• Material: Aluminum
• Weight: 24 kg

Best for: Silver aluminum multi-vehicle storage.

Why it ranks #3: Its 48 x 12.5 x 13-inch aluminum body offers side-mount storage, a corrosion-resistant tread pattern, and a lockable design.

A silver finish and stated compatibility with pickups, RVs, ATVs, trailers, and other listed settings distinguish this 48-inch PRUNkuar box. Its textured five-bar aluminum construction is described as corrosion resistant, while the side-mount format adds accessible storage without using the center of a truck bed.

The 48-by-12.5-by-13-inch footprint offers a long compartment for tools and equipment, and side mounting keeps it along the bed edge to preserve central cargo space. Textured five-bar aluminum is described as durable and corrosion resistant in harsh weather, supporting use across the listed vehicles and work settings. The lockable feature helps secure stored gear. Its silver finish differs from the black version, and the listed 24-kilogram weight is useful to account for when handling the box.

Skip it if you need a lighter listed 48-inch box; Northern Tool & Equipment’s side-mount model lists a 22.4-pound weight.

This works for buyers seeking silver aluminum storage for a pickup or one of the other listed vehicle and work settings. Consider its 24-kilogram weight and 48-inch length when assessing handling and the available mounting area.

Listed on Amazon as: 48 Inch Side Mount Truck Tool Box Aluminum Pickup Truck Bed

#4

4. PRUNkuar 48-Inch Black

• Dimensions: 48"L x 12.5"W x 13"H
• Material: Aluminum
• Weight: 53 lb

Best for: 48-inch textured aluminum box.

Why it ranks #4: The 48 x 12.5 x 13-inch aluminum box has a textured tread surface, a space-saving side-mount design, and a lockable feature.

This 48-inch PRUNkuar box combines a long side-mount footprint with textured five-bar aluminum, giving pickup owners weather-oriented storage without occupying the middle of the bed. Its 12.5-inch width and 13-inch height define the space available for tools, while the lockable feature supports secured storage.

The side-mount arrangement keeps the box along the truck bed edge, leaving more central room for cargo while keeping tools accessible from the side. Its 48-by-12.5-by-13-inch dimensions provide a long compartment for organizing equipment, and textured five-bar aluminum is described as corrosion resistant in harsh weather. The listed lockable feature supports securing stored items, although the supplied specifications do not identify the lock type. The 53-pound listed weight is relevant when planning handling and installation.

Skip it if you need a lighter listed box; Northern Tool & Equipment’s 48-inch aluminum side-mount model weighs 22.4 pounds.

This suits pickup owners wanting long, weather-oriented aluminum storage along the bed side, with a lockable feature and defined dimensions. Consider the listed 53-pound weight and available rail space when planning placement and installation.

Listed on Amazon as: 48 Inch Side Mount Truck Tool Box

#5 · Steel Construction

5. 8SC82 48-Inch Steel Box

• Dimensions: 48"L x 13.4"W x 12.8"H
• Material: Alloy Steel

Best for: Long welded-steel storage.

Why it ranks #5: Its 48-inch steel body has a welded one-piece tub, a lockable stainless steel handle, and a listed 0.058-inch steel construction.

A 48-inch one-piece steel tub and lid give this side-mount box a long, sturdy storage span for pickup tools. Its rail-side placement preserves central bed space, while integrated gas-strut lifts make the lid easier to raise when hands are full and provide convenient access to stored gear.

The welded 0.058-inch steel tub and one-piece lid are described as supporting heavy loads and absorbing tool drops, offering a rugged option for demanding storage. At 48 by 13.4 by 12.8 inches, it provides a long compartment while remaining positioned along the truck bed side. Integrated gas-strut lifts help raise the lid when carrying items, and the lockable stainless-steel handle adds security. The smooth, corrosion-resistant surface is specified for use in harsh weather.

Skip it if you want a 48-inch aluminum box; PRUNkuar’s TO1029-BKx2 uses textured aluminum construction.

Choose this for pickup owners who prioritize a long steel compartment, tool-drop resistance, and gas-strut-assisted opening. Its 13.4-inch width and steel construction are important considerations when evaluating available rail space and preferred box material.

Listed on Amazon as: 48 Inch Side Mount Tool Box Steel Pickup Truck Storage

#6

6. PRUNkuar 36-Inch Black

• Dimensions: 36"L x 12"W x 13"H
• Material: Aluminum
• Weight: 37 lb

Best for: Pair of textured aluminum boxes.

Why it ranks #6: This 36 x 12 x 13-inch aluminum side-mount box includes a lock and keys, with a five-bar tread described as corrosion-resistant.

A two-piece set of 36-by-12-by-13-inch side-mount boxes gives pickup owners paired aluminum storage while keeping gear along the bed sides. The textured five-bar tread is described as corrosion resistant and able to withstand harsh weather, making it a practical surface choice for exposed truck-bed use.

The side-mount layout adds storage without taking over the central bed area, and the 36-inch length provides a defined space for tools and equipment. Textured aluminum with five-bar tread is described as durable and corrosion resistant in harsh weather, supporting outdoor truck use. Locks and keys are mentioned for securing contents, though the supplied information does not detail the lock mechanism. The two-box pack can separate gear by task or location, provided both boxes fit the available rails.

Skip it if you want a specifically described lockable paddle latch; ZUCIVI’s 34-inch box lists that latch type and includes keys.

Pickup owners wanting paired, textured aluminum storage can use these boxes to organize gear along the bed sides. The 13-inch height and two-box quantity deserve consideration when planning rail space and deciding how much central cargo room to retain.

Listed on Amazon as: 36 Inch Side Mount Truck Tool Box Aluminum Pickup Truck Bed Tool Box Trailer Storage Black 2Pcs

#7 · Two-Box Set

7. Vigorighter 36-Inch Steel Pair

• Dimensions: 36.8"L x 12"W x 12.5"H
• Material: Alloy Steel

Best for: Two-box bed-rail storage.

Why it ranks #7: The listing includes two lockable, dustproof alloy-steel boxes, each stated at 36.8 x 12 x 12.5 inches for side-rail mounting.

A two-box pack pairs side-rail mounting with 36.8-by-12-by-12.5-inch steel storage, giving pickup owners space for tools and camping gear while preserving room in the bed. Side access also lets you reach stored gear from beside the truck rather than climbing into the cargo area.

The bed-rail mounting keeps the boxes along the sides, leaving more of the central bed available for cargo, while direct side access makes frequently used tools easier to retrieve. Each box measures 36.8 by 12 by 12.5 inches, a defined footprint for organizing items such as wrenches, chains, or camping supplies. Alloy-steel construction has a powder-coated finish and is described as corrosion-resistant; dustproof, lockable storage and included keys help protect contents from exposure and casual access.

Skip it if you need a single aluminum box; Northern Tool & Equipment’s 48-inch side-mount model uses aluminum construction.

Pickup owners seeking paired steel boxes for tools or camping supplies can use the side-rail layout to keep the bed center open. Check that the 36.8-inch length and 12-inch width suit your truck’s available rail area.

Listed on Amazon as: 36 Inch Side Mount Tool Box 2 Pack, 36.8 x 12 x 12.5 Inch Steel Pickup Truck Side Tool Box Storage ToolBox with Lock Latch and Keys, Black (Pack of 2)

#8

8. ZUCIVI 34-Inch Aluminum Box

• Dimensions: 34"L x 12"W x 15"H
• Material: Aluminum

Best for: Tall welded aluminum storage.

Why it ranks #8: Its compact stated length is 34 inches, and the listing describes welded aluminum construction, a lock, and a rust-resistant finish.

A 15-inch height gives the ZUCIVI side-mount box a taller storage profile than many shallow rail boxes, accommodating tools that need more vertical room. Its 34-by-12-inch footprint and welded aluminum structure combine a compact length with reinforced construction for pickup-bed tool storage.

Thickened aluminum panels and manually welded joints add stiffness and load-bearing support, making the box suited to storing heavier tools than a lightly built organizer. The black powder-coated finish is described as rust resistant, while the tread pattern increases friction on the exterior surface. At 34 by 12 by 15 inches, it offers useful vertical capacity in a shorter footprint; the lockable paddle latch and included keys provide controlled access to stored gear.

Skip it if you need a longer rail box; PRUNkuar’s 48-inch TO1029-BKx2 offers a longer footprint.

This suits pickup owners storing taller tools in a lockable aluminum box and preferring a welded, reinforced structure. The 34-inch length is the boundary to consider if your equipment needs a longer compartment or your rail space calls for a different footprint.

Listed on Amazon as: 34 Inch Side Mount Truck Tool Box Heavy Duty Pickup Tool Box

#9

9. FGJQEFG 36-Inch Aluminum Pair

• Dimensions: 38.58"L x 30"W x 14.76"H
• Material: Aluminum
• Weight: 38 lb

Best for: Paired shallow aluminum boxes.

Why it ranks #9: This listing offers two lockable aluminum boxes, but its specifications state dimensions of 38.58 x 30 x 14.76 inches, making fit harder to assess.

Two aluminum boxes with a listed 7-inch width offer a notably shallow storage profile for truck, trailer, or RV setups. The title specifies 36-inch boxes, while the overlapping-lid and seal-ring details address weather exposure, helping keep stored items cleaner when the boxes are mounted in an exposed location.

The two-piece quantity can provide storage on both sides of a vehicle or separate tools from other gear, while aluminum construction keeps the boxes lighter than a steel equivalent according to the product description. An overlapping lid and seal ring are intended to resist leakage and rainwater entry, helping protect the interior. The title gives a 36-by-7-by-12-inch size, but listed specifications show different overall dimensions, so buyers should resolve that discrepancy before planning placement.

Skip it if you need a clearly specified single 48-inch box; Northern Tool & Equipment’s side-mount model lists consistent 48-by-11.5-by-11-inch dimensions.

Consider this pair for buyers wanting shallow aluminum storage across a pickup, trailer, or RV setup. The overlapping lid and seal ring suit exposed use, but the conflicting listed dimensions make confirming the actual footprint essential before planning installation.

Listed on Amazon as: 36'' Inch Aluminum Side Mount Truck Tool Box Pick Up Truck Bed RV Trailer Toolbox Storage Organizer with Side Handle, Lock & Keys,Black,5 Bar Tread (36"X7"X12")-2PCS