Master Lock SLC126DKA4 Commercial Entry Lever Lockset, Satin Chrome DOOR LOCK APPLICATION: For indoor and outdoor use; Best used for heavy-duty commercial exterior entry doors EASE OF USE: Six pin Schlage C compatible cylinder; Removable thru-bolts and clutch feature DURABLE DESIGN: Cylindrical construction for enhanced durability; Bump resistant cylinder featuring BumpStop technology HEAVY DUTY SECURITY: 3 hour UL listing; Meets ANSI/BHMA A156.2, Grade 2 standards SPECIFICATIONS: 2-3/4 in. fixed backset latch; Includes two keys