Description The Park Tool Bottom Bracket Tool BBT-79.3 will allow you to install and remove select threaded BB’s with 12-notch tool fittings. Including SRAM BSA DUB, Race Face Cinch, Rotor BSA30, and others. Manufactured in-house by Park Tool, anodized for easy identification and featuring a ratchet/torque wrench-compatible 3/8″ drive. The BBT-79.3 features integrated threads for full compatibility with the Park Tool BBT-RS Bottom Bracket Tool Retaining System (sold separately). Park Tool Bottom Bracket Tool BBT-79.3 Compatibility: Fits 12-notch threaded bottom bracket tool fittings with a major diameter (outside of notches) of 45–47 mm and a minor diameter (inside of notches) of 44 mm, including: SRAM® BSA DUB® Race Face® Cinch® Rotor® BSA30 Zipp® Vuma™ Hawk Racing™ BB3086™ and more Not on the list? Check out Park Tool’s BB tool finder here. Not designed for use with impact drivers or other power tools.