In an office building for example each employee can have their own key which unlocks the door to their office.
Multiple door locks keyed different with one master key.
Master and different master a master key opens every lock in a master keyed suite.
Keyed different is the standard keying default on master lock and american lock door locks.
At the same time more than one key can open the same lock.
In the average master key system an employee would not work to unlock the doors of other offices.
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In short a master key system allows one keys to open multiple different locks.
Keyed alike and keyed different when two or more locks cylinders can be opened by the same key they re keyed alike in a group of keyed different locks cylinders each lock has a unique combination requiring its own key.
Additionally using this unique master control key system will reduce your lock changing time to seconds per door without old fashioned tools to remove the lock.
Master keying not to be confused with master lock brand locks is a system in which one key can open multiple locks.
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When rekeying multiple locks to fit a single key all locks must first have been made by the same manufacturer.
Your cost is reduced to half per re keyed cylinder including the keys.
A simple but expensive option for making all your doors open with the same key is to pick up the phone and call a locksmith.
Keyed different kd each door lock is opened by its own unique key that does not open any other lock in the set.
For example if your front door lock is a schlage the other locks you want rekeyed.
In theory this is a good thing.