excal. come with a crank on some new models ,if not they sell one that is removable. if you can use a allen wrench you can fix any prob. you mite have. i hunt with 8 or 9 people that have one . other than retying the serving on the string when it wears out [ keep it waxed ] and we shoot them a lot. we have not had a prob. that was the bows fault
