Chamberlain Craftsman LiftMaster Belt Drive Shaft Assembly 41A4885-5 For use on Belt Drive openers made by Chamberlain, Liftmaster, Sears Craftsman 2001 and newer The belt sprocket (pulley) on this 41A4885-5 has a 14 cogs (ridges) 41A4885-5 kit includes drive gear and worm gear, helical gear with retainer, grease, roll pins, bearing plate, thrust washer, retaining ring, spring washer. Compatible with the following models: 2280 2580 2585 WD822K WD922K WD912KS WD822KS WD3280 3580 3585 8557