A double ended metal cutting insert includes a pair of {HEAD ~ circular cutting edges} disposed at {TAIL ~ respective end surfaces} of the insert 
disposed at
A double ended metal cutting insert includes a pair of { HEAD ~ circular cutting edges } disposed at { TAIL ~ respective end surfaces } of the insert
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH