People often assume rekeying means swapping the lock for a new one. It does not. The lock stays exactly where it is, on the door you already have, looking exactly as it did.
Inside a standard cylinder sits a stack of small brass pins of varying heights. The correct key lifts each of them to precisely the right level and the cylinder turns. Rekeying means taking the cylinder apart, replacing those pins with a different combination of heights, and cutting a new key to match. From that moment the old key lifts the pins to the wrong heights and the cylinder will not turn.
That is why it is the right answer for an access problem. You do not have to find every copy, prove who has one, or ask anybody to hand anything back. Every key cut before today simply stops working, and it costs far less than replacing the hardware.
- Hardware stays
- Same lock, same door, same appearance.
- Pins change
- A new combination of pin heights inside the cylinder.
- Old keys die
- Every key cut before the visit stops turning.