The Park Tool BBT-69.4 is a precision CNC-machined aluminum tool for the installation and removal of select components with 16-notch tool fittings, including bottom brackets, center lock disc brakes, and e-bike motor lockrings. Manufactured in-house by Park Tool, anodized for easy identification and featuring a ratchet/torque wrench-compatible 3/8" drive. 3/8" drive fitting Bafang BBSH, BBS02 mid-drive motor lockrings Fits 16-notch tool fittings with a major diameter (outside of notches) of 44-45 mm and a minor diameter (inside of notches) of 42.7 mm, including: Shimano BB80, BB5700, XT BB70, BB51, and previous external bearing threaded bottom bracket cups. Also; Threaded bottom bracket cups from Campagnolo, Chris King, FSA MegaExo, Hope, SRAM/Truvativ GXP, Race Face X-type, Surly, Wheels, Fulcrum, and others Center lock disc brake rotor lockrings