What is a Master Keyed System?

A master-keyed system involves each lock having its own individual key which will not operate any other lock in the system, but where all locks can be operated by a single master-key. This is common in office suites or apartments. You can even have us install a Grand...

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You quote a rekey “per cylinder”, What is a cylinder?

A cylinder in a lock is the mechanism in which a key is inserted. If you have a lock that uses a key for the outside of the door, and has a thumb turn for the inside of the door, that is considered 1 cylinder. If you need a key to unlock the door from the inside as...

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