Park Tool HCW-5 Crank and Bottom Bracket Wrench

Double sided bottom bracket lockring hook spanner.
One side is a single hook, the other is a hook spanner with 3 notches for better engagement in the lockrings.
The three-hook end will fit 3-notch lockrings with a maximum outside diameter of 46mm, and minor diameter (in the notches) of 40mm.

NOTE: The HCW-5 is designed for bottom bracket lockrings. For fixed gear lockring, use the HCW-17 .