Can be operated by lever inside or key in the outside lever Outside lever is always locked, inside lever is always unlocked. BumpStop advanced cylinder resists bump attacks. Cylindrical construction delivers enhanced durability. Features ASA strike, 3 1/4in. diameter trim, 2 3/4in. backset with UL latch, 6-pin Schlage C compatible cylinder standard and satin chrome finish. Meets ANSI/BHMA A156.2, Grade 2 standards. Master Lock(R) Heavy-Duty Storeroom Lever is one of many Security available through Office Depot. Made by Master Lock.