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