this is a great tool for uniforming the inside neck. i reamed quite a few last week and the next day my right hand about killed me...pure and simple, muscle strain from turning the finger operated handle. the round handle comes off and i thought the removable crank handle from the wilson trimmer cutter, since it comes off, would fit it and allow a more efficient twisting of the reamer...no way, it doesn't fit! is there a a crank-type handle to fit the reamer? i can have a machinist make one but i would have thought that wilson would have offered one, if not, why? this reamer does a fantastic job on donuts, but my old hand can only take so much. thanks.