Two turned sizes (1" and 1-1/8") fit 90 percent of the clutch plates. The tapered cone handles the rest. Faster, easier replacement of clutches Worried about replacing and aligning your clutch?  You will have no worries when using this tool.  It aligns the clutch plates and pilot bearings accurately.  Also the shaft and bushings provide an accurate fit for eight pilot bearing sizes. This is a great set to have, saves time and makes the job easier.