Kwikset Chelsea Single Cylinder Handleset w/Copa Knob featuring SmartKey in Lifetime Polished Brass Designer style and superior security with this Kwikset Signature Series product 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 Interior knob with universal handing; fits both right handed and left handed doors Features an adjustable latch to fit all standard door preparations