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The universal design of the CWP-7 has 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 arms. Also fits BNI cranks on Bosch e-bikes. The CWP-7 is made for the 22 x 1mm threading in the common cranks.