COMMONLY USED LOCKSMITH
TERMS:
Cost Per Cylinder - Where ever a Key goes in!
Keyed
Alike - Locks are said to be keyed-alike when one and only one key operates all of them. This is in contrast to locks that are keyed-different and not the same as locks that are mastered-keyed.
Keyed-Different - Locks in a group of locks that are "keyed-different" each require their own individual keys to operate. No individual key will operate more than one lock in the group.
Keys by Code-
Often times keys can be made by a Locksmith from the code number of a lock. This is common with vehicles, padlocks, filing cabinets, etc. Requiring proof of ownership before cutting a key by code is a standard procedure used by Security Professionals to safeguard security. Additional requirements for car ignition keys may be mandated by State law (registration, driver's license, etc.).
Master-Keyed - In a group of locks that are Master-keyed (MK) each lock is operable by both it's own individual key and the Master-Key. Each individual key operates it's own lock only. The Master-Key operates all the locks in the group. This is the simplest type of Master-Keyed set-up. Other intricate systems are also possible using sub-Masters, Grand-Masters, etc.
Rekeying - a lock...Rekeying (changing) a lock is the process of replacing the tumblers (pins, pin tumblers) of a lock cylinder with other tumblers of different sizes. The lock will then require a different key to operate. The new key will coincide with the new tumblers and the old key will no longer work. In other words, it is not necessary to buy new locks. Re-keying locks is something that should be done if you have moved into a new residence or lost a set of keys. It is a good practice NOT to have any identifying information on your key ring, especially your address or phone number.
Re-keying locks is usually significantly less expensive than replacing locks.
Tumblers - are those parts inside a lock (key lock or safe lock) that have to be aligned to precise positions in order for the lock to operate. With a key lock, the tumblers are aligned by using the correct key. In a safe lock the tumblers are aligned by dialing the correct combination.