For use on exterior doors where keyed entry and security is needed. Featuring SmartKey?; re-key the lock yourself in seconds in 3 easy steps. Fully reversible lever; fits both right handed and left handed doors. Fits door thickness of 1-3/8 in. to 1-3/4 in. Features an adjustable latch to fit all standard door preparations. ANSI/BHMA grade 1 security.