Cross-keying is a term that is used to describe a cylinder that is operated by more than one change key. This is different than a master keyed cylinder because usually a cylinder that is master keyed will only be operated by one change key as well as the master key.

In order to provide an effective barrier to prevent fire, a door has to remain closed within the frame.

Locks are one of the world's oldest inventions, with a wide variety and thousands of years of development. The door lock is one of the locks that are indispensable for any occasion in our lives. The importance of door locks is particularly evident. Today we will combine the definition and characteristics of door locks with a brief summary and analysis of door locks.

In front of the lock forms on the market, many consumers are confused; don't know how to choose the stainless steel door lock to be both safe and durable?