The door is securely closed by a magnet plate that grabs the steel producer. The installation is quick and convenient. Use self-tapping screws to install the steel plate on the door. The -up self-locking device is installed on the inside of the door, the inside of the door frame, etc., and can be used in correspondence with each other. Easy to use, just apply pressure on the door and the door open. The high elastic spring can the door about 2cm. Perfect for use on closets, cabinet doors, bathroom cabinet doors, mounted on cabinet doors Suitable for all sizes of sleepers and trim, suitable for double doors and handleless doors