Master key system is a system that allows two or more keys to open one lock.
Master key for all door locks.
You can open each lock with its own key or card and the master key or card.
Master key systems often use pin tumbler locks.
Pin tumbler master locks use a master wafer pin in between the key pin and the driver pin.
At the same time more than one key can open the same lock.
You might then have the science building with 40 locks.
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Kwikset makes a rekeying kit that includes all the parts and tools you need to create a master key.
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Once you have weighed the pros and cons and decided whether or not you want to have all of the locks in your house keyed alike call all american locksmiths.
To allow for entry using your original and master keys change the pins in the lock mechanisms in each door.
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The head of the science department.
Keyed different is the standard keying default on master lock and american lock door locks.
Keyed alike ka all door locks in the set are opened by the same key.
In short a master key system allows one keys to open multiple different locks.
In an office building for example each employee can have their own key which unlocks the door to their office.
The drawbacks are that anyone with a key will have access to your entire home and all of the locks will need to be rekeyed if a key is lost.
Use the key in the kit as the master key.
The headmaster would have a key to all 200 locks and the caretaker would have a key to 199 locks to exclude the headmasters office.