Kwikset featuring SmartKey Single Cylinder Deadbolt, Polished Brass 780 L03 SMT RCAL RCS K3 Kwikset Signature Series For use on exterior doors where keyed entry and security is needed Featuring SmartKey re-key technology; 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-Inch to 1-3/4-Inch