Bottom Bracket Tool - BBT-9 - from Park Tool USA

One end of the BBT-9 securely engages the 16 notches of the bottom bracket cups, while the other end engages the 8 internal splines of the crank arm adjustment cap. Also fits the Campagnolo Ultra-Torque bottom bracket cups.Weight: 280g (10oz)

The BBT-9 works with many external bearing crank set bottom brackets including:

If you want to use a torque wrench to get correct tightness, then an alternative is the BBT-19 bottom bracket tool.

Park Tool Ref: BBT-9 

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: Bottom Bracket Park Tool