Re-Key and Master Keying

Master keying changes the pins to allow multiple different keys to work one door/lock. Many doors/locks can be master keyed so that one key works them all and they also accept another key that works a door/lock individually. When a master system is used there can be different levels of security added onto one facility or multiple locations. This allows you to give high priority key holders the ability to open all the doors/locks with one key, and give low priority key holders access to only the few rooms into which they are allowed.