{TAIL ~ The drilling/reaming tool} 1 wherein the reamer flutes are wound in the opposite direction to {HEAD ~ the main flute} 
{ TAIL ~ The drilling / reaming tool } 1 wherein the reamer flutes are wound in the opposite direction to { HEAD ~ the main flute }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD