Cylinder Locks are the most commonly recognised type of pin tumbler lock. This means that the lock mechanism uses pins of varying lengths to prevent the lock opening without the correct key being used. The greatest advantage of using cylinders locks over lever locks is the number of key differs available. There are millions of key differs available which allows extensive master key systems as well as a high degree of key security for thousands of locks. A master key system is where the "master key" (override key) will open a number of locks which also have their own different keys. The cylinder key system is therefore well suited to commercial property where key security may be an issue.
For a more in-depth look at master key systems, have a look at this article and video:
Cylinder locks are also ideal for use in situations where you have a need to have a keyed-alike suite. For example, you may wish to have your front and back door on the same key, or perhaps you've a set of storage rooms that you would like to be able to lock and unlock with just one key. Cylinder locks can be used to operate a variety of different locks including nightlatches and deadlocks, simply by utilising the cylinder lock in an appropriate lock case.
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