Park Tool BBT-79.3 External Bottom Bracket Tool

• 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
• 3/8" drive fitting
• Integrated threads for full compatibility with the Park Tool BBT-RS Bottom Bracket Tool Retaining System (sold separately)