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