The door security lock is easily unlocked from the inside with a simple swinging motion, while being too strong to open from the outside. The door lock is made of high-quality solid zinc alloy, beautiful and elegant, and can perfectly match your beautiful decoration. The door lock is not easy to rust or oxidize and has a longer service life. The extra-thick swing arm and sturdy locking base ensure sturdiness and can withstand up to 600 pounds of pressure. New quality, high quality. A swing door lock is a security locking device for swinging doors that allows people in a room to open a few inches for identification or ventilation purposes, while providing privacy and security for guests and residents. The door lock can be installed out of reach of children so that they cannot open the door by themselves, providing additional protection for children. The safety lock uses steel balls for positioning. This is a unique lock that holds the locking arm in place so that it cannot rotate,