Park Tool - HCW-5 Bottom Bracket Lockring Spanner
PARK TOOL - HCW-5 BOTTOM BRACKET LOCKRING SPANNER
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 a minor diameter (in the notches) of 40mm.