Park Tool Bottom Bracket Lockring Wrench HCW-5

. 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 Buy Park Tool BB Tools from Chain Reaction Cycles, the World's Largest Online Bike Store.