What is rekeying?
Locks have a set of pins within the cylinder that match the cuts on your keys. Rekeying is the process of replacing these pins with a new set and providing new keys with the matching cuts to fit. If the lock is master-keyed, there will be an extra layer of pins in the cylinder that allow more combinations of keys to fit. New home construction will have master-keyed locks, and a simple rekey will eliminate the combination of other keys that will open your locks.