U-Change locks are part of a user-rekeyable lock system that can be used to secure houses, businesses, mailboxes or property. These locks come with a lock-change tool that allows the system to be rekeyed as often as necessary without the need for a professional locksmith. This may be an ideal security measure for those using the lock in a high-security area. The lock can be rekeyed by inserting the currently used key and the included change tool.
Insert the U-Change key that is currently being used into the lock's keyhold. Turn the key a 1/4-turn clockwise.
Slide the change tool into the small slot above the keyhole. Leave the change tool in the slot, and remove the key.
Insert the new key that you would like to use. Remove the change tool.
Turn the new key back to a vertical position, then remove it. The lock now operates with only the new key.