The Park Tool Hollow Tech 2 Bearing Adjuster Cap is a workshop quality tool for installing, removing and adjusting the end caps on Shimano HollowTech II cranks Park Tool Hollow Tech 2 Bearing Adjuster Cap Features Investment cast steel construction for years of hard use 8 mm Allen key socket on the rear for use with a torque wrench or 8 mm Allen key to give extra leverage when removing seized caps Recommended torque setting for crank arm adjustment cap: 0.4 - 0.7 Nm