Shifting the position of the inserts relative to the feed path of the electrode allows {HEAD ~ more than one portion} of each cutting edge on {TAIL ~ the insert} to be used 
on
Shifting the position of the inserts relative to the feed path of the electrode allows { HEAD ~ more than one portion } of each cutting edge on { TAIL ~ the insert } to be used
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH