PJ LOCKSMITH
Key System Customisation
1
Keyed Alike (KA)
Definition: One key opens multiple locks that are all keyed the same.
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Use case: Convenience. You have multiple doors (e.g., front door, back door, garage) but want to carry just one key.
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Example:
All doors in your house have locks that work with a single key.
2
Master Key System (MK)
Definition: Each lock has its own unique key, but there is also one master key that opens all the locks.
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Use case: Control and access hierarchy. Used in offices, schools, apartments, etc.
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Example:
Individual office doors have their own keys.
The building manager has a master key that opens all doors.
3
Construction Key System (CK)
Definition: A temporary key (construction key) works during construction, but stops working once the owner inserts their own key.
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Use case: Builders or contractors can access during construction, but not after handover.
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Example:
Builders use a construction key to access the house while building.
Once you insert your permanent key, the lock disables the construction key.
