The Kwikset Double Cylinder Deadbolt is operated by a key on both sides. This deadbolt has a latch that has two interchangeable faceplates - round corner and square corner. Its matte black finish provides a rich and warm complement to the product's style. It has Smart Key Security, which protects against advanced break-in techniques and allows you to re-key your lock yourself in seconds. | Kwikset | | SmartKey Security Matte Black Metal Double Cylinder Deadbolt | Best Buy