Park Tool BBT-49.3 Bottom Bracket Tool 16 Notch 39mm

Fits 16-notch threaded bottom bracket tool fittings with a major diameter (outside of notches) of 39-40 mm and a minor diameter (inside of notches) of 37.6 mm, including: Shimano® XTR® BB93 Shimano® Dura-Ace® BB9000 Shimano® Dura-Ace® BB-R9100 Token® Also fits chainring lockrings on Shimano® STEPS square spindle e-bike systems including: E6000 E6002 E6050 Replacement for Shimano TL-FC38 tool. Not designed for use with impact drivers or other power tools.   A 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 in the United States 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 Retaining System (sold separately). The BBT-RS uses an adjustable spring-based tension system to apply consistent, adjustable pressure to the tool, ensuring full engagement with the tool fitting and preventing slippage.