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