The wrench makes it easy to work without slipping or damage. Used to mount and dismount Shimano® Hollowtech II center groupsets, Campagnolo® Ultra-Torque and Power Torque, Race Face®, FSA®, SRAM®, Truvativ®, Chris King®, and many more. The small wrench is designed to install and remove plastic bolts on Shimano Hollowtech II cranks. The wrench is also suitable for loosening/tightening the external nut (lockring) for mounting CenterLock discs.