Crank and Bottom Bracket Spanner - HCW-5 - from Park Tool USA

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.

Weight: 210g (7.5oz) 

Park Tool Reference: HCW-5

About Park Tool :

Park Tool has been manufacturing bicycle specific tools since 1963.

Based in St. Paul, Minnesota, USA, Park Tool is the world's largest bicycle tool manufacturer.

A long-term dedication to quality, innovation, and customer service has made Park Tool the first choice of professional and home bicycle mechanics around the world.

Just visit your local bike shop - chances are that they will be using Park Tool tools for bike service / repair.

Related tags: Wrench Spanner Crank Bottom Bracket Park Tool