The CCP-44 is a purpose-built tool for removing crank arms from bicycles with 3-piece cranks that use an M12 or M15 crank bolt including many splined Shimano Octalink ISIS Drive and ISIS Overdrive systems. The CCP-44 uses extra-fine thread and a long comfortable handle that provides the needed leverage to remove even the tightest cranks. The strong floating tip system ensures smooth operation and long life.NOTE: For crank systems that use an M8 or M10 crank bolt such as square taper or PowerSpline use the Park Tool CCP-22 or CWP-7