UWS (EC20503) Matte Black Aluminum Secure Lock 48" Under Tonneau Chest Box (Heavy Packaging)


List Price: $788.95
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The UWS Secure Lock under tonneau chest box is the ideal truck bed tool box for pickups with a tonneau cover. It features a low profile for wide-range compatibility, dual Secure Lock handles, our patented RigidCore lid, extra-thick aluminum construction and a dependable construction.

This UWS under tonneau tool box is engineered to be compatible with a wide variety of tonneau covers. It measures just under 16-1/2" tall to sit low in the truck bed and offer enough clearance for most tonneau covers. The lid is also offset toward the rear to maximize storage area and maintain unobstructed lid operation. The lid self-opens to a full 90 degrees for convenient access when your hands are full (may be limited by tonneau cover style).

Product Details

  • 16-1/2" high profile with offset lid to be compatible with most tonneau covers
  • 8.85 Cubic feet inside storage capacity
  • Patented RigidCore foam-filled lid to maximize strength and prevent binding
  • 0.058" extra-thick, 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
  • Assembled in USA
  • Limited lifetime warranty (one-year finish, one-year parts)


  • Includes tool box only (mounting hardware available #003-CBOXMK; sold separately)
  • 90-degree lid opening operation may be limited by tonneau cover style
  • This part is identical to #SLC-48-MB, only it is heavily packaged for parcel shipment


Brand UWS
Finish Black
Warranty Limited Lifetime Warranty (One-Year Finish, One-Year Parts)