Park Tool high quality tools ensure that headsets are properly serviced.Oversized Crown Race Setting System uses two different insert rings to install bearing races on 1.5" and 1-1/4" forksThe bearing surface is spared a direct hit by using an aluminum insertUsing a hammer, tap firmly on the end cap of the tube and seat the race into its proper place safely and accuratelyIncluded extension allows work on fork steering tubes up to 425mmSHIS terminology: The CRS-15 services crown races in SHIS 33 and 40 Park Tool Headset Tools Headset Tool UPC: 763477002174