Master Lock, 1671, Built-In Combination Lock for Lift Handle, Single Point and Box Lockers - Hinged on Left (no Key is included). Offering high security in built-in combination locks, the Master Lock No. 1671 features a deadbolt locking mechanism and is designed to fit almost all locker styles. Ideal for mesh and ventilated lockers with access to the back of lock, the manual action requires the dial to be turned to relock the door. Five different pre-set combinations available for a longer, useful life in your facility. Standard key control used for combination changes, allows quick supervisory access. Features: Designed for lift handle, turn handle, and single point latch/box horizontal latch locker doors with hinges on right; Manual deadbolt locking; Secure, easy to dial 3-digit combination; Longer useful life with 5 different pre-set combinations; easily changed to maintain security; End user registration and control charts provided to secure and simplify administration; Use Model 1677MKADA for ADA Applications; Extension kit available for doors with a thickness of 11/16in (17mm) to 3/4in (19mm).