Product: Park Tool (109917) HCW-5 Lock Spanner
Brand: Park Tool
Color: Silver
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

Search query: bottom bracket lock nut
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