"This heavy-duty Northern Tool + Equipment in-frame truck box is designed for mounting between the frame and truck rails to provide low-profile access for storage of heavy chains, binders and tie-down straps. Features rugged 0.100 diamond plate aluminum construction. U.S.A. Dimensions L x W x H in. 24 x 22 x 10, Mount Type Between frame/truck rail, Application To provide low-profile access for storage of heavy chains, binders and tie-down straps, Finish Type Smooth body aluminum finish w/diamond plate open lid, Handle Type Padlock style. Padlock loop"