Adams Rite MS + 1891 3015 628, MS Series Deadlock/Deadlatch, 1-1/8" Backset, Left Hand, Clear Anodized

Deadlocked maximum security after hours plus traffic-control convenience for management during the business day. Typical installation is a bank or store requiring three match modes of door control: 1) Both lock and latch bolts retracted for unrestricted entry and exit during business hours. 2) Handle-operated latch for exit-only traffic just after closing. 3) Maximum security hookbolt for over-night lockup.