[SIZE] - 1.02" (26mm) long; 0.16" (4mm) mounting hole diameter; Aluminum alloy, silver tone spray paint, corrosion resistance. [APPLICATION] - Suitable for door fixing, window fixing, cage door or window fixing, etc. [INSTALL] - Use a cross screwdriver to tighten. For harder wood, it is recommended to make a small hole before install. Can be freely installed from different angles. [Note] - Do not use a hammer to install directly. Screws is not included in the package. [Advantage] - Automatic door bolt, spring-loaded, pull ring bounce. 1.Automatic door bolt,spring loaded,pull ring bounce. 2.Easy installation, with three gaskets of different thickness, installation can easily adjust the position of the bolt and the buckle in a horizontal plane. 3.Mainly components are made of aluminium alloy, which is firm and durable. The appearance adopts spraying technology. There are several colors to choose. They are suitable for matching the color and style of your doors and window. 4.Can be used to enhance security for doors,Gate and window. Specification: Material: Aluminum alloy Finish: Spray paint Main Body Size: 26mm x 41mm x 23mm / 1.02" x 1.61" x 0.91" (L*W*H) Extension Length of Bolt: 9mm / 0.35" Buckle Size: 10mm x 40mm x 22mm / 0.39" x 1.57" x 0.87" (L*W*H) Mounting Hole Diameter: 4mm / 0.16" Package Content: 1 x Door Bolt Latch