The Chris King® Bottom Bracket External Cup Tool is anodized aluminum and features a 3/8" socket drive. Ahigh-quality torque wrench is recommended for installation. The spline interface on the reverse side perfectly matches the Chris King® Bottom Bracket cups to ensure a secure fit during installation while preventing damage to the finish of the bracket.
Have a great biking season, and happy riding!
The Customer Service Team at AVT
Chris King® is a trademark of King Cycle Group.