Weather Guard Top Mount Boxes

Shop Weather Guard top mount boxes, also called hi-side tool boxes. A top mount box sits on top of the bed rail along the side of the truck, giving you more height and capacity than a lo-side box while keeping the bed floor open. Weather Guard top mount boxes come in 64.25-, 72.25-, 90.25- and 96.25-inch lengths, in a 13.25 x 16-inch profile and a larger 16.25 x 18-inch profile, plus a 96.25 x 16.25 x 24-inch steel box. Aluminum models come in bright aluminum, gloss black, textured matte black and white; steel models come in white. They're American-made, backed by a limited lifetime warranty, and most orders ship within 1 business day from our strategically located warehouses across the US. Compare every style in Weather Guard tool boxes or see the full Weather Guard lineup.

Choosing Length and Profile

Match the box length to your bed rail, then choose the profile. The 13.25 x 16-inch boxes keep a slimmer footprint over the bed, while the 16.25 x 18-inch boxes add width and height for bigger tools and cases.

Related Weather Guard Equipment

Want a lower box on the rail? See Weather Guard lo-side boxes. For full-width storage behind the cab, see Weather Guard crossover boxes. To compare other brands, shop all top mount boxes.

Weather Guard Top Mount Box FAQs

What is a top mount tool box?

A top mount tool box, also called a hi-side box, mounts on top of the bed rail along the side of the truck. It adds tall, lockable storage while leaving the bed floor open for hauling.

What is the difference between top mount and lo-side boxes?

A top mount box sits higher on the rail and holds more. A lo-side box sits lower for a slimmer look and easier reach over the side.

What sizes do Weather Guard top mount boxes come in?

Lengths are 64.25, 72.25, 90.25 and 96.25 inches, in 13.25 x 16-inch and 16.25 x 18-inch profiles, plus a 96.25 x 16.25 x 24-inch steel box.

What finishes are available?

Aluminum top mount boxes come in bright aluminum, gloss black, textured matte black and white. Steel top mount boxes come in white.

Are Weather Guard top mount boxes made in the USA?

Yes. Weather Guard top mount boxes are American-made and backed by a limited lifetime warranty against defects in materials and workmanship.