Acme C-Clamp Ski Propeller Puller - ACME-228S - The Acme 228S Prop Puller is a one piece stainless steel casting that is able to pull any 3 or 4 blade ski boat prop with a 1" thru 1 1/8" prop shaft diameter. VERY IMPORTANT PRECAUTION: When using a inboard prop puller always leave a nut on the shaft threads remove no more then half the thread length so that when the prop breaks loose the nut can stop the prop and puller from causing injury.