Clutch and sprocket kit fit for Stihl 026 024 MS260 MS270 MS280 MS271 MS291 MS240 Chainsaw Chainsaw with Washer E-Clip Kit Replace Clutch assembly replaces 1121 160 2051 325 pitch spur sprocket replaces 1121 640 2004, 1121 160 2051 Sprocket Clutch Worm replaces 1121 640 7110 Package comes with 1 clutch, 1 sprocket, 1 worm gear, 1 sprocket bearing, 1 clutch washer. We provide 3 months free for replacement or return to make sure your satisfaction of the product.