Through {HEAD ~ the use} of dual cutting inserts, the drill cuts the full circumference of {TAIL ~ a bore} with each one half revolution and therefore achieves the a faster axial feed rate 
Through { HEAD ~ the use } of dual cutting inserts , the drill cuts the full circumference of { TAIL ~ a bore } with each one half revolution and therefore achieves the a faster axial feed rate
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH