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