The Park Tool CCP-4 is specifically designed to remove crank arms from Shimano® splined, oversized, "Pipe Billet" bottom bracket spindles and ISIS systems that do not use a "One Key Release" system. It uses a long handle and a fine thread for the leverage needed to remove tight crank arms. Rotating tip ensures smooth operation and long life. NOTE: Park Tool CCP-4 will NOT work on crank arms that fit standard square, tapered bottom bracket spindles. See lower image to right.