The surface of the zinc alloy handle lock will have a copper plated design, which is similar to the copper die cast handle lock. You can use a file to rub the bottom plate of the cable giant to see the traces left by the file. If it is brass, it indicates the copper die cast style of the handle lock. Silver white is the material of zinc alloy.

As the name implies, door lock is a device used to lock the door to prevent others from opening the door. There are many types of door locks, and the requirements for door locks are different in various occasions. Ordinary families usually use anti-theft door locks, which are safe and cheap.