PRODUCT DESCRIPTION As the industry leader Kwikset has provided trusted security for over 60 years and has become synonymous with security peace of mind style and innovation. The largest-selling deadbolt in America the 600 series provides tough effective protection at an affordable price. This single cylinder deadbolt can be locked or unlocked by a key on the outside or the turn button on the inside. SmartKey Re-key Technology allows you to control who has access to your home. Re-key the lock yourself in seconds in 3 easy steps. Have you recently moved or had a child lose a key? It s time to re-key. SmartKey provides the highest level of residential security and features BumpGuard to protect against lock bumping. The Venetian Bronze finish is hand-rubbed to reveal unique bronze highlights and provides a rich and warm complement to the product s style..Locking mechanism functions with turn piece on the interior of the lock FROM THE MANUFACTURER Step up to designer styles and superior security with Kwikset Signature Series products. The elegant high-end design of the Laurel egg knob is sure to make a lasting impression. The crisp clean appearance of the Satin Nickel finish adds to the overall look of the product and brings a modern feel. This privacy knob is best used in interior bed and bath applications where privacy is required. Both knobs/levers are locked or unlocked by turn button inside. The outside knob/lever can be unlocked by an emergency key.