Elements by Weiser® provides an expanded choice styles and finishes at an affordable price. Both knobs/levers can be locked or unlocked by a key on the outside, or turn piece on the inside. The crisp, clean appearance of the Satin Nickel finish adds to the overall look of the product and brings a modern feel. ?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. ?ANSI/BHMA grade 2 certified. ?Lifetime mechanical and finish warranty. ?Universal handing; fits both right handed and left handed doors. ?Easily installs in minutes with just a screwdriver. ?Comes with 2 keys.