This is a sprocket shaft for a chamberlin,liftmaster or sears craftsman. chain drive model It is used and excellent condition . Sprocket shaft assembly is Compatible with ALL units from Liftmaster, Chamberlain, Sears Crafstman, Master Mechanic and some Wayne Dalton from 1984 - 2000 Part is shipped cleaned and unassembled as in pic 3 (993)
