Automatic door bolt, spring-loaded, pull ring bounce.Suitable for door fixing, window fixing, cage door or window fixing, etc.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.Do not use a hammer to install directly. The three colors below including mounting screws. Widely Application In some fence doors or cage doors, daily in and out, the frequency of use is relatively high, you can install our spring latches. For some windows, especially those that are locked with ordinary bolt latch everyday, you can consider changing to a bolt latch with spring, which is not easy to rust, is more convenient than manual ones, and takes longer to use. It is easy to install and has a variety of colors, which is practical and beautiful. Daily doors and windows, especially some taller windows on the door, usually need to be opened and closed with the help of a chair or ladder. Many places can be replaced by spring latches, which are spring-loaded and do not need to be strenuous to close them.