One of the less known advantages of rekeying is the ability to rekey several locks so that they can all use the same key.
A while ago I was called to rekey a one story home in North Vancouver. The owner had nothing less then six (6) locks and over 30 different keys to the house. I was able to rekey all the locks to only one key. In the past he had quite a few locksmiths rekey his locks but nobody has ever told him that he could have all the locks “Keyed Alike” (KA)