Double Door Semi Box | Semi Boxes | Highway Products Inc. Skip to content

Double Door Semi Box

Double Door Semi Box

Keep your straps, tarps, and tools secure and accessible.

Double Door Semi Box

Lifetime Warranty

Designed to last a million miles

  • Lifetime Warranty since 1980 = overengineered and overbuilt
  • American Made by skilled tradesmen
  • Built with only premium materials and components
  • Sealed for protection from thieves and weather
  • Multiple finish and locking options
  • Lifetime Warranty – Retire your truck but keep the box
Lifetime Warranty

The Highway Products Double Door Semi Box is the only underbody toolbox designed and built to last a million miles.  With structural corner gussets, angle braces, and bottom face stiffeners you can be sure that this underbody toolbox will not fail to the tests of the road.  Choose from different finishes and locking options to get a box that fits your truck’s specific needs and uses.  Like everything else we build, the HPI Double Door Semi Boxes come with Highway Products’ lifetime warranty.

WHY AN HPI™ Double Door Semi Box



Highway Products boxes are completely reinforced to prevent the torsional forces that causes welds to crack and boxes to fail.   The structure is the secret to our Million Mile Boxes.

WHY AN HPI™ Double Door Semi Box

Highway Products boxes are completely reinforced to prevent the torsional forces that causes welds to crack and boxes to fail.   The structure is the secret to our Million Mile Boxes.

You will never see bungies holding together an HPI Double Door Box. Thanks to ¼” stainless steel hinges, with 3/8” knuckle secured by torx screws, and stainless T-handles with 3/8” spring loaded locking rods.

We use 1/8” 5052 marine grade aluminum to ensure you won’t deal with rust or deterioration of your toolbox over the years on the road in all different conditions.

Upgrade from smooth aluminum to polished stainless steel doors, or even powder-coat your boxes for a unique look.

Stainless steel bar locks for max security and leverage to get into your box even in the worst weather.

Everything built at Highway Products gets our Lifetime Guarantee

Checkout some photos and videos of Double Door Semi Box.