Material: 304 Stainless Steel with Waterproof Cover Feature: 1> Key-lock recessed T-handle lock, 2 keys. 2> Gasket and metal anti-water cap available. 3> Ideal for use on steel, wood and fiber-glass doors, truck tool box. 4> Suitable for 1-4.5mm Door Note: Please allow 1-3mm size error due to manual measurement, thanks!!!