Includes: gear and sprocket, worm gear, grease, motor shaft bearings, sprocket bearings & instructions
Compatible with chain drive Chamberlain sears craftsman manufactured operators 1984-current
Compatible with Chamberlain, Sears, Craftsman and LiftMaster 1/3 and 1/2 HP chain drive models
Verified 100% authentic OEM Liftmaster product
Easy DIY & complete assembly