Hillman Hardware Essentials Dead Bolt Rim Cylinder Lock is used as a replacement cylinder for a garage door dead bolt. Works as a replacement lock cylinder to a deadbolt lock system mounted in the center of the door. Durable and attractive aluminum finish. Replacement part to be used with an existing dead bolt, pivot plate and locking arms. Package includes instructions, mounting hardware and warning/safety information. WARNING: INCORRECT INSTALLATION OR DOOR POSITION CAN CAUSE SERIOUS INJURY OR DEATH. See package warnings and enclosed instructions.