Feature:1. METAL STRUCTURE: The hinge is made of zinc alloy blank and aluminum alloy core, painted with a matte black finish, rustproof and corrosion resistant.2. EASY TO ADJUST: The concealed door hinge can be used inward or outward as required, and is easy to adjust and does not require dismantling the door.3. 180 DEGREE SWING: The door hinge supports 180 degree opening or closing, and can swing at any angle within the range, suitable for installation in various places.4. EASY TO INSTALL: Equipped with screws and hex wrench, this hinge is easy to install and remove, ideal for folding doors, cabinet doors, etc., suitable for home use.5. GLOSSY FINISH: This concealed door hinge has a glossy finish, with compact size, and will not hurt your hands or scratch the door surface when installed.Specification:Item Type: Concealed Door HingeMaterial: Zinc Alloy, Aluminum AlloyColor: SilverUsage: Wooden door, folding door hinge.Package List:1 x Concealed Hinge4 x Screws1 x Hex Wrench