Wheels Manufacturing XTR Cap Driver. The XTR Cap Driver is specifically designed to remove and install the crank arm bolt cap on Shimano-XTR-M9100 series crank arms. Servicing crank arms or removing damaged M9100 crank arm bolts has never been easier. Designed to be used with a 3/8" drive socket or torque wrench for easy installation and removal.

3/8" drive interface

Precision machined aluminum

Anodized Red