The patented cylinder makes it possible to reprogram (re-key) a lock an unlimited number of times. The reprogrammable locks are available in a variety of configurations including residential and commercial locksets, mortise cylinders, cam and rim cylinders, and padlocks. The same key can be used in multiple types of locks, unifying security hardware throughout a facility. This revolutionary system is ideal where quick and secure re-keying is desired such as apartments, commercial buildings, vending and gaming applications, and retail stores. Brinks locks allow the user to quickly and efficiently re-key their locks without the added expense of hardware replacement.