Park Tool HCW-5 hook

Double sided bottom bracket safety hook spanner. One side is a single hook, the other side is a hook spanner with 3 notches for better engagement with the locking rings. The three hook end fits 3 notch lock rings with a maximum outer diameter of 46mm and a smaller diameter (in the notches) of 40mm.

NOTE: The HCW-5 is designed for bottom bracket lock rings. For lock rings with fixed teeth, use the HCW-17.