BBT-49.3 Bottom Bracket Tool — 16-NotchA precision CNC machined aluminum tool for the installation and removal of select threaded bottom brackets with 16 notch tool fittings, including Shimano XTR BB93, Dura Ace BB9000, and Token bottom brackets. Manufactured in house by Park Tool, anodized for easy identification and featuring a ratchet torque wrench compatible 3 8" drive. The BBT 49. 3 features integrated threads for full compatibility with the Park Tool BBT RS Bottom Bracket Tool