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