Single Door Underbody Box Slide 01

Side Open Semi Box

HPI is the home of the million-mile boxes

Underbody tool boxes are often overlooked when ordering trucks and trailers. They all have similar looks on the outside and seem very simple. Take another look before you order. Look at the metal thickness: if it's not an 1/8-inch thick, it just won't last! Road conditions are too tough. Look at the hinge. Does it look oversized? If not, it's not tough enough. Are the hinges stainless steel? How about the way the hinge is fastened? Rivets work loose after time. This could be the weakest point of the tool box.

HPI Benefits

The HPI difference is in the materials we use, the attention to all details and ultimately products we produce and proudly guarantee. Our promise is to take the best care of your product while we manufacture it, and continue to care for a lifetime after you receive it.

Lifetime Warranty

All of our products come with a Lifetime Warranty against defects in manufacturing (failed welds, etc.). It also includes all locking mechanisms, hinges, gas shocks, weatherstripping and any other materials we use. Learn More

Military Grade Aluminum

Highway Products uses nothing but the best materials. Our products are hand crafted out of Military Grade aluminum. Why take it that far? The days of using nothing but the best ingredients are all but gone in this world. We refuse to sink to that level. That’s the HPI difference.

Asset 1

Hand-Made in the USA

Hand crafted from beginning to end right here in the USA. Every square inch of our products are touched by human hands, every step of the way.

Product Features

All HPI products come standard with options and features that you would normally pay extra for. Please explore all of our standard and optional features and call us with any questions you may have!

  • 5052 Smooth Aluminum

    We build our Side Open Semi Box from rust-free 5052 aluminum, the same material used by the military, aircraft manufactures and boat builders.

  • T Handle Locks

    Our ergonomically designed T-Handle locks are the most secure locking mechanism on the market.

  • Watertight Seal

    We use Clean Seal™ automotive stripping around the edges of each toolbox to ensure a watertight seal.

  • Piano Hinges

    Piano hinges provide full-length support and reduces stress points caused by inferior hinges.

  • Reinforced Strength

    Highway Products tool boxes are reinforced and reinforced again. That's why they last for millions of miles. We didn't get our reputation from skimping. Our underbody boxes are built with Herculean strength.

  • Stainless Steel Torx Screws

    Stainless steel Torx screws are the toughest fasteners on the market today. These fasteners won't loosen as you drive down the road and a door can be replaced without a special rivet gun.

  • Angle Bracing

    One of the weak points of truck tool boxes is the bottom corners. There is so much road stress from carrying heavy tarps, chains, tools, and other equipment, the corners sometimes break. Highway Products has eliminated this problem with reinforced angle bracing welded in the corners.

  • Optional Dividers

    A divider option placed on one side of the underbody tool box keeps tie-down chains from drifting around the tool box, plus a hanging bar.

Hpi Black Diamond Plate

HPI Black Diamond Plate

Our signature HPI Black Diamond Plate finish combines that trendy satin look with just a little shine to hide scratches and keep that tough black look.

Diamond Plate

Diamond Plate

Tried and true. The all time classic finish. Rugged, durable and will last forever.

Hpi Black

HPI Black

Our signature HPI Black finish combines that trendy flat look with just a little shine to hide scratches and keep that tough black look.

Custom

Custom Colors

Custom colors? You bet we do that! Whether you need a color match, want something to stand out or blend in, we can cover it.

Interested in our Side Open Semi Box?

Our team of Product Specialists are on standby to answer any remaining questions you have about our Side Open Semi Box or to assist you in placing your order.

Customers Also Bought

Customers that purchased our Side Open Semi Box were also interested in the following products: