Key control deadbolt. 2 cylinder system allows for master key management. Both cylinders features SmartKey rekey technology allowing for quick rekeying of cylinder. SmartKey Security protects against advanced break-in techniques and allows you to re-key your lock yourself in seconds. Master keyway is accessible with a turn of the deadbolt face cover allowing for property management control. SmartKey rekey technology eliminates traditional pins and springs. SmartKey cylinder is a bump-resistant, higher pick-resistant lock and is easily rekeyed with learning tool (included). SmartKey Security re-key technology is compatible with Kwikset (KW1) keyway.