Stainless Steel: The main body is made of high-quality stainless steel to ensure quality and durability, even in the rain. The brushed surface will not rust and resists everyday scratches and corrosion. Suitable for 5-7 mm glass thickness: Suitable for 5-7 mm glass thickness. Adjustable screws fit most types of glass, suitable for glass panels, display cabinets, bookcases, wine cellars, shelves, etc. Easy Installation: You don't need to drill holes in the glass and ruin the overall beauty of the glass. Easy to install, no complicated process, saves you time. Double hinge design: Used to connect two fixed glass panels at a 90-degree angle 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 individual screws are not included.) Number of pieces supplied: 4 Good meeting