UWS (SLC-48-MB): Secure Lock Under-Tonneau Chest Box

Compatible with most tonneau covers, the SLC-48-MB Secure Lock under-tonneau chest box from UWS perfectly adds functional storage space and organization to your pickup while maintaining the option of keeping your truck bed covered. The box measures 16 1/2” high, allowing it to fit under most tonneau covers, and the lid is offset to allow opening and closing—even with the tonneau cover rolled or folded up.

This chest box comes with a durable matte-black powdercoat. It is also available in bright aluminum.


  • 16 1/2” high profile with offset lid to be compatible with most tonneau covers
  • Patented RigidCore™ foam-filled lid maximizes strength and prevents binding.
  • Extra-thick, 0.058”, one-piece aluminum tub holds heavy tools and cargo.
  • Easy-to-operate, dual-locking twist handles for enhanced security
  • Connecting rod allows for convenient operation from driver or passenger side.
  • Interior rod enclosure helps prevent bending and jamming of lock system.
  • MicroSeal™ gasket helps seal out moisture, dust, and dirt.
  • Lid self-opens to 90 degrees for convenient operation and loading.
  • Includes toolbox only (003-CBOXMK mounting hardware available and sold separately)
  • Assembled in USA
  • Warranty: limited lifetime (1-year finish and parts)

Ready to buy? Need help with the install? To find your nearest Total Truck Centers affiliate, see our Store Locator. Or join the conversation at the Total Truck Centers Facebook page!

Though this is not a paid review, this content has been produced by The AAM Group in support of manufacturers with whom it has a business relationship.

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