{HEAD ~ The cold working reamer} 1, wherein {TAIL ~ the cutting edges} include a plurality of helical cutting edges 
wherein
{ HEAD ~ The cold working reamer } 1 , wherein { TAIL ~ the cutting edges } include a plurality of helical cutting edges
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH