This is a Gear and Sprocket Replacement Kit. For use with various 1/2HP LiftMaster® and Chamberlain® Chain Drive Garage Door Openers; manufactured after 1993. This complete replacement kit includes: helical gear and top hat assembly, wear bushings, worm gear, grease, and hardware needed to replace the chain drive gears. Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility.

Genuine LiftMaster® replacement part.