Mounting Brackets

Don't try to mount your underbody box without them.

Smaller tool boxes do okay with top mounting, but make sure you have a backing plate inside, and if you can also weld or bolt the backing plate to the side of the tool box this will help. Most of the strength is in the sides. Don't forget to silicone the holes to keep them from leaking.

Like our Mounting Brackets but want something special done to it? Call our sales team now to start creating your own custom variant!

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.

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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.

This product can expose you to chemicals that are known to the State of California to cause cancer. For more information, go to

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!

  • L Brackets
    We recommend mounting in a cradle situation whenever possible. This takes a lot of the stress off the tool box. Our brackets are made of stout, 1/4" military-grade aluminum and come in two designs for mounting the boxes to the frame, or to cross members.
  • Plate Brackets
    Plate Brackets come with backing plates and are designed to eliminate "side-shifting", which is the motion you get when taking off or hitting the brakes. This motion is very hard on underbody truck tool boxes.


Standard raw aluminum, all polished up. Super easy to clean and shines right back up with minimal maintenance, if any.

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 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 Mounting Brackets?

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

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