In big cities, often occur many crimes that can harm us and others. To combat this, several steps need to be anticipatory protection, such as installing CCTV cameras, alarm system; auto key lock feature for your door handle is equipped with a key lock, and some other security features. The use key locks to handle the door when it’s been a lot done in several apartments in big cities. This is a necessity related to security conditions contained in the big city. Usage handle lock key is not too difficult and very simple. Usually when you buy a handle them, you’re given a special number that serves to open the door handle, and in this case only you know the code, and also your family.