The cutting edges of {TAIL ~ the burnishing section} are configured with an orientation opposite to that of the cutting edges of {HEAD ~ the reaming section} 
The cutting edges of { TAIL ~ the burnishing section } are configured with an orientation opposite to that of the cutting edges of { HEAD ~ the reaming section }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD