.100 thick diamond tread aluminum construction. Welded gussets in each corner of the door frame. Strattec high quality key cylinder. Gas shocks to lift and hold doors industry exclusive. Free turning handle when locked. Full wrap one piece body design. Full HD aluminum lock cover protection. Mounting hardware is included. Brute HD Class Top Sider Tool Box; Polished Aluminum; L 48 in. x W 13 in. x H 16 in.; HD Top Sider 13in x 48in w/flip up Door Overall Dims: 48x13x16 In.; Approx. Cu Ft: 7.4 In.