Park Tool BBT-59.3 Bottom Bracket Tool BBT-59.3

- A precision CNC-machined aluminum tool for the installation and removal of select threaded bottom brackets with 16-notch tool fittings\n- Fits 16-notch bottom bracket tool fittings with a major diameter of 41-42mm and a minor diameter of 39mm\n- 3/8" drive compatibility\n- Retailers are not permitted to sell on the Amazon.com marketplace unless authorized in writing by Park Tool