Description:Automatic door bolt,spring loaded,pull ring bounce.Easy installation, with 3 gaskets of alternative thickness, set up can smoothly adjust the location of the bolt and the buckle in a horizontal plane.Major elements are manufactured from aluminium alloy, which is agency and durable. The appearance adopts spraying technology. There are several colours to choose. They are appropriate for matching the color and beauty of your doors and windows.can be used to reinforce safety for doors,gates and windows.Specification:Material: Aluminum alloyFinish: Spray paintMain 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