Check the listing for details. 4pcs Door Bolt Latch Aluminum Alloy Security Spring Bounce Lock. Condition: New. Listed at 14.88 USD. Description: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 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:4 x Door Bolt Latch.