10mm size for specific applications Designed specifically to install, adjust, or remove Campagnolo Ultra-Torque cranksets and Mavic hubs, the Pedro's 10 mm Hex Driver stretches out 100 mm to reach the critical center of the bottom bracket. The tough handle with a rubberized grip means all the force goes into the job, not in the hand of the mechanic. The long side of the wrench has a ball end to allow for quick tightening.