The best low profile side mount truck tool box depends on the storage length, construction, and lid design you need. The UWS 48-inch matte black model suits buyers seeking a reinforced low-profile lid and welded aluminum body; its 36-inch version fits those wanting a shorter option. Northern Tool’s 48-inch box emphasizes a weather-resistant seal, while PRUNkuar offers a longer 60-inch treadplate design. Compare dimensions and mounting clearance with your truck before choosing.
| Product | Best For | Notable Feature |
|---|---|---|
| UWS 48-inch Matte Black | Reinforced low-profile storage | RigidCore lid and welded aluminum tub |
| Northern Tool 48-inch | Weather-sealed storage | Complete lid seal |
| UWS 36-inch Matte Black | Shorter side-rail storage | Low-profile RigidCore lid |
| PRUNkuar 60-inch | Longer treadplate storage | Textured aluminum construction |
| UWS 48-inch | Reinforced lid without matte-black listing | 0.058-inch welded aluminum tub |
UWS 48-Inch Matte Black Side Tool Box
This UWS model is best for buyers who want a 48-inch side-mount box with a low-profile lid and a reinforced design. It mounts on top of the truck bed rail, providing side access while adding storage above the bed floor.
The RigidCore lid contains solid foam intended to help prevent binding. UWS lists a one-piece tub made from welded 0.058-inch aluminum, described as thicker than the aluminum used in most tool boxes. Its matte black finish and low lid are intended to coordinate with low-profile crossbed boxes.
Limitation: The listed information does not provide the box’s interior capacity or complete installation dimensions, so check fit against your bed rails before buying.
Northern Tool 48-Inch Side-Mount Box
Choose this Northern Tool box if a weather-resistant lid seal is a priority. Its listed dimensions are 48 by 11.5 by 11 inches, offering a specific size reference for shoppers measuring available rail space.
The box uses heavy-duty, rust-resistant diamond treadplate aluminum with a matte black finish. A complete weather-resistant seal around the lid is designed to help keep out dirt and moisture, and a metal-reinforced lid brace adds support.
Limitation: The feature list does not state a low-profile lid design or provide details about the lock, so compare its height and security features with your needs.
UWS 36-Inch Matte Black Side Tool Box
This shorter UWS box is best for buyers who want the same listed low-profile lid and aluminum construction as the 48-inch model in a 36-inch length. Its side-mount layout provides access from beside the truck while storing tools along the bed rail.
Like the larger model, it has a RigidCore lid filled with solid foam to help prevent binding. The one-piece tub is made from welded 0.058-inch aluminum, and the low lid is designed to match low-profile crossbed boxes.
Limitation: Its shorter length may not suit buyers who need to store longer tools; the supplied listing does not state interior dimensions.
PRUNkuar 60-Inch Treadplate Tool Box
PRUNkuar is best for buyers looking for a longer 60-inch side-mount box. The listed dimensions are 60 by 8 by 14 inches, and the side-access layout is intended to add storage while preserving bed space.
Its heavy-duty textured aluminum has a five-bar tread pattern. The product description says the tread is corrosion-resistant and designed to withstand harsh weather. A lock and key are included in the product name, but the supplied features do not explain the lock mechanism.
Limitation: Its 60-inch length requires careful measurement, and the listing does not specifically describe a low-profile lid.
UWS 48-Inch Heavy-Wall Side Tool Box
This UWS option is best for shoppers comparing a 48-inch low-profile box with a RigidCore lid and a welded aluminum tub. The listed features match the matte-black UWS model’s lid and tub construction: side-rail mounting, solid foam inside the lid, and a one-piece tub made from welded 0.058-inch aluminum.
It is a better fit for buyers who prioritize those construction details over a specifically listed matte black finish. The low lid is described as coordinating with low-profile crossbed boxes.
Limitation: The product name does not specify a finish, so verify the finish shown on the listing before ordering.
Buying Guide: How to Choose a Low Profile Side Mount Box
What length and height will fit your truck?
Measure the usable bed-rail length and check the box’s listed dimensions against nearby equipment, cab clearance, and the space needed to open the lid. The products here range from 36 to 60 inches in length. Do not assume that two boxes with the same nominal length have the same height or depth.
Which construction details matter?
Compare the stated material and reinforcement features. The UWS boxes list a welded 0.058-inch aluminum tub and RigidCore lid. Northern Tool specifies treadplate aluminum and a reinforced lid brace. PRUNkuar describes textured aluminum with five-bar tread. These features are not identical, so prioritize the details that match your intended use.
Do you need a weather-resistant seal?
Northern Tool specifically lists a complete weather-resistant seal intended to block dirt and moisture. The other selected product descriptions do not provide the same seal detail. If weather protection is essential, check the listing for sealing information rather than assuming all truck boxes offer equivalent protection.
How should you compare low-profile designs?
A low-profile lid can help maintain a streamlined look, but the term alone does not confirm exact height or clearance. Check product dimensions and compare them with any crossbed box, tonneau cover, or other bed accessory you use.
Frequently Asked Questions
What does side mount mean on a truck tool box?
A side-mount box attaches along the top of a truck bed rail, placing storage beside the bed rather than across the full bed width.
Which listed box is shortest?
The UWS side-mount model with a 36-inch length is the shortest of the five selected products.
Which option lists a complete weather-resistant seal?
The Northern Tool 48-inch box specifically lists a complete weather-resistant seal around its lid.
Should I measure before buying?
Yes. Check the available rail length and the product’s full dimensions, and confirm that the lid can open without interference from other equipment.