• LiftMaster Limit Switch Shaft & Sprocket. • For use with rebuilding old style Rockyview limit boxes. • K72-33872-1 • Fits common garage door brands such as: SteelCraft, Barcol, Garaga, Overhead Door, Clopay & more. • Door and Lock Surgeon Supply carries a variety of garage door limit switch cam shafts to meet your garage door limit switch cam shaft needs.