A mortice lock is a door lock fitted for security. Mortice locks are fitted inside the door and require a hole or pocket to be cut into the door for it to be fitted. The main body of the lock sits within this pocket. The term "mortice" refers to the hole or recess which is cut into the door. Mortice lock are commonly found in internal doors within the home.
Mortice locks have several lever variations: a 2, 3, 5, or 7 lever mechanism. The higher the number of “levers” the more difficult the lock is to “pick” and the more secure it will be. The deadlocks on a mortice lock also mean that if a burglar breaks in through one of your windows they can not escape through the door without a key.
Mortice locks are made from metal and come in different finishes, for example, polished brass, satin chrome and stainless steel.
There are 2 main types of mortice locks Sashlocks and Deadlocks.
A differ is a combination for the lock. For example, 1000 differs has 1000 combinations.