Stainless Steel: The main body is made of high quality stainless steel to ensure quality and longevity in wet weather. The brushed surface will not rust and can resist daily scratches and corrosion. Suitable for 5-7mm thick glass: Suitable for 5-7mm thick glass. Adjustable screws fit most glass, suitable for glass panels, glass door cabinets, bookcases, wine cabinets, countertops, etc. Easy Installation: No need to drill holes in the glass to ruin the overall beauty of the glass. Easy to install, no complicated process, saving you time. Double Hinge Design: Used to connect two fixed glass panels at 90 degrees, or as a support for the horizontal glass shelf in the box. Package includes: 4 x double glass clamps with screws and washers. (please note that the screw is on the hinge, other single screws are not included) Number of pieces delivered: 4 happy meeting