UWS TBSM-48-BLK Black Aluminum Side Mount Box with Beveled Insulated Lid Patented fully foamed lid creates a rigid wall between outer aluminum layers to help prevent bending or warping Stainless steel T-lock brass lock system provides rust-free product life, One-hand access and 3 latch points for strength and security 0.063 inch aluminum One-Piece Tub and Lid is designed to support heavy loads, absorb tool drops and prevent leakage Self-closing struts automatically close the lid, with slight manual pull, securing the box when hands are full 2 built-in tool trays and screwdriver holders add extra strength and rigidity. Lid opens 90 degree for easy loading and unloading of tools and equipments