Velocity Bicycle Service
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:
Also fits chainring lockrings on Shimano® STEPS square spindle e-bike systems including:
Replacement for Shimano TL-FC38 tool.
Video link: https://www.youtube.com/watch?v=R7BZupz-aGM