Product Description:NEW Gear and Sprocket Kit - Fits Chamberlain, Sears, Craftsman, LiftMaster Door Gate Opener - Includes: Gear and sprocket, worm gear, grease, motor shaft bearings, sprocket bearings, instructions.Specifications: Includes: Gear and sprocket, worm gear, grease, motor shaft bearings, sprocket bearings, instructionsCompatible with chain drive chamberlain sears craftsman manufactured operators 1984-currentCompatible with chamberlain, sears, craftsman and lift master 1/3 and 1/2 HP chain drive modelsVerified 100% authentic OEM lift master product- new production datesEasy DIY- complete assemblyCompatible with 2245, 2255, 2265, pd210, pd212, pd610, pd612k, 1200 series, 1240, 1245, 1246, 1250, 1255, 1256, 1260, 1265Fits More Models:Access master 41A5021-FChamberlain 2265RChamberlain 248730Chamberlain 41ac050-1 1/2 hpChamberlain series 4100 1/2 hp 41CA4220Chamberlin Liftmaster 41A5021Chamerlain LiftMaster model 41A5021-1F openerCraftman 1/2Hp door lift unitCraftsman 0.5 HP 139.53975SRTCraftsman 1/2HP chain drive opener 1999Craftsman 139.53315Craftsman 139.53615srCraftsman 139.53970srtCraftsman 139.53975srt1Craftsman 139.53995SRTCraftsman 13953646 srt 1Craftsman 13953910DCraftsman 2666a 1/2 HPCraftsman 41a4315-7dCraftsman 41A5021-2FCraftsman opener 41A5483-2cDoor Opener 2265RLift Master 3265 1/2 hpLift Master Professional 2245LiftMaster 1150 1/3 HPLiftmaster 1245KLiftmaster 1245RLiftMaster 1245R garage doorLiftMaster 1256LMLiftmaster 3255Liftmaster 41A3625Liftmaster 41A3627Liftmaster 41A5021-1DLiftmaster 41a5021-1gLiftmaster 41A5483-1BLiftmaster profession 1/3 hp chain drive opener a1ag5021-1gLiftmaster Professional 1/3 HP LiftMaster 411265LM 1/2HPOpener 1265-267Opener 13953660srt1Opener 41A4207-5Opener 41a4252-7bOpener 41A5021Opener 41A5021-1H-315Opener 41A5483Opener 41ac050-2Raynor Garage Door Open 1265RGD 1/2 HPRaynor Navigator 41A5486 B1Sears 1/2HP garage door openerSears 139.53515SRSears Craftsman 139.536Sears Craftsman 139.53650srtSears Craftsman 139.5384SRTSears craftsman opener 41a4315-7a Thank You for Shopping!