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 neededFeaturing SmartKey re-key technology, re-key the lock yourself in seconds in three easy stepsFully reversible lever, can be installed on both right-handed and left-handed doorsEasily installs in minutes with just a screwdriver