The Park Tool BBT-10.2 is a specialty tool for removing and installing crank caps on Shimano Hollow-Tech II cranks. Includes a built-in hook to lift the safety plate found on Hollow-Tech II crank arms, speeding crank removal. The investment-cast steel body provides good leverage and includes an 8mm hex fitting for removing seized or overtightened caps. Features: Removes and installs crank caps on Shimano Hollow-Tech II cranks Includes built in hook to lift the safety plate Feel, investment cast body provides good leverage Fitting for removing seized or overtightened caps. Park Tool BBT-10.2 Shimano Hollow-Tech Adjusting Cap Tool