Master key

Master Keying

Master keying is a keying system in which more than one key can operate a lock or group of locks. Master keying is commonly used to restrict or allow access to a group of locks in a facility based on a user's access level. Various types of master keying exist depending on the type of lock and the number of access levels required. The use of master keying can have a dramatic effect on the number of real key differs in a keying system.

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See also

• Key
• Combination
• Lock