Hillman Hardware Essentials 7-1/2" Side Lock is used as a garage door dead bolt lock. Can be used with an existing outside handle such as a "L" or "T" handle. Side locks can be used on the left or right hand side of the door when mounting. Package includes instructions, mounting hardware and warning/safety information. WARNING: INCORRECT INSTALLATION OR DOOR POSITION CAN CAUSE SERIOUS INJURY OR DEATH.