The Key Control Deadbolt is perfect for multi-family dwellings, student housing, assisted living & rental properties. Weiser’s Key Control Deadbolt, featuring SmartKey Re-key Technology, is a revolutionary cost and time-saving alternative to master keying. With the first and only two-cylinder Key Control Deadbolt, either cylinder can be re-keyed in seconds, without removing the lock from the door. Retain your one-key access to all units and gain more flexible key management, all while saving time and money. 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 Smart Alternative to Master Keying . With two separate lock cylinders, this Weiser key control deadbolt is ideal for property managers. It allows for more tenant key cuts than a traditional master key system, and the tenant key will never fit into the property manager cylinder--which is concealed. Simply rotate the cylinder face to expose the control key cylinder. -For use on exterior doors where keyed entry and security is needed -Top concealed cylinder provides 1-key control for the property manager