Adaptor for the park crc-1 that allows the quick and perfect facing of 1.5 inch/39.8 mm standard crown races. Designed for use on tapered steerer forks. Grub screws lock adaptor and Cutter in place for easy use. Includes precision ground crown race Cutter. For best results, use plenty of park cf-2 cutting fluid. Made in the USA and covered by Park Tool legendary limited lifetime warranty.