Material: Made of high-quality carbon steel, with a fine black powder-coated finish, rust-resistant and corrosion-resistant, sturdy and durable. EASY INSTALLATION: Follow the installation manual as shown, simply drill 2 holes in the door, then tighten with screws and wrenches. Applications: Can be installed on interior and exterior doors, wooden doors, sliding barn doors, garage doors, pocket doors, swing doors, etc. Black Length 600mm Hole Spacing 400mm