If you’ve misplaced your key or if you are concerned that the missing key is in the the possession of an untrusted party, instead of replacing your locks altogether and being forced to pay for the hardware you can simply rekey your existing lock making the original key useless. Rekeying is the procedure of altering a lock’s internal pins thereby making the initial key no longer usable, allowing the lock to be used with a new key. By rekeying a lock you can consolidate an unlimited number of locks to your home to the same key. This can save you the hassle of carrying a multitude of keys on your key-ring. Finally, you can make a single key work with a minimal number of locks, a second to work with two additional locks and a third that works with all of the locks for access to limited areas. This is also known as master rekeying.