Mounts on lighter weight straight tongues of boat and snowmobile trailers. Patented Fully Foamed Lid creates a rigid wall between outer aluminum layers to help prevent bending or warping. Lid Opens 90º for easy loading and unloading of tools and equipment. 0.063 in. Aluminum Tub and Lid is designed to support heavy loads, absorb tool drops and prevent leakage. Self-Closing Struts Self-Closing Struts automatically close the lid, with slight manual pull, securing the box when hands are full. MicroSeal Stripping helps seal out moisture, dust and dirt.