With Weiser you can blend simplicity with elegance. Just like the city, Prague is the ideal mix of contemporary design with subtle traditional details, featuring clean lines and curved arches. The simple, clean aesthetic of this knob instantly elevates any home interior. Both knobs 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 or interior doors where keyed entry and security is neededFeaturing SmartKey re-key technology, re-key the lock yourself in seconds in three easy stepsUniversal handing fits both right-handed and left-handed doorsEasily installs in minutes with just a screwdriver