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