A: Re-keying means adjusting the tumblers in an
existing lock so that only new keys can open it. Many people, who continue to use the same key that they received when they bought their home, have no idea of how many people such as tradesmen, neighbors and friends etcetera, who are no longer relevant, have had access to that key. Most technicians can re-key your locks and give you the security of knowing that only you and the people you trust will have access to your domain.Lost your keys? Relax; re-keying will adapt your existing locks to new keys.
All-Time Locksmith installs, replaces and upgrades lock cylinders, lock-sets and deadbolt locks. www.chicagolocksmiths.net

I'm not sure where in the states you're living, but here in Chicago IL its pretty reasonable. I can refer you to Chicago Locksmiths, I've used these guys once and they were great. Here's a link to their site. http://www.chicagolocksmiths.net/local-chicago-locksmith.php

used Chicago locksmith throughout the years and have found them always to be professional, courteous, experienced and willing to come out immediately whenever an emergency has occurred. http://www.chicagolocksmiths.net/