Park Tool crank pullers can easily remove even the tightest cranks.Features a rotating tip pressed into each end of the tool (11.3mm and 16.3mm) so it will remove both square taper and splined (ISIS Drive, Octalink) crank armsMade for the 22 x 1mm threading in the common cranksRotating tips pressed into each end of the tool (11.3mm and 16.3mm) to remove both square and splined crank arms