No Batteries. No Wires. No Maintenance. No Operating Expenses. No Worries. Yes, Exclusive Patented Features. Yes, The Perfect Lock. This combination lock is a simple plug-and-play solution that makes retrofitting a breeze and the struggles of code log maintenance or battery replacements a thing of the past. Users benefit from quick and easy access by choosing their own memorable alphanumeric code; one letter, one number, one perfect mechanical combination lock solution. They can rest assured that their belongings are safe and sound in shared or assigned lockers. Managers obtain smooth operations and absolute control. With one simple master reset key, managers can gain instant access, efficiently bypassing the set code from the front of the locker in a matter of seconds. The multi-function master reset key also provides management an effortless way to retrieve a forgotten code and reset the lock from the front of the locker. The patented reprogrammable cylinder revolutionises the need to replace locks or cores in the unfortunate circumstance of the theft of a master key.