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