{TAIL ~ The cutter} of the present invention is connected to {HEAD ~ the rotary unit} and adapted to contact the formations 
{ TAIL ~ The cutter } of the present invention is connected to { HEAD ~ the rotary unit } and adapted to contact the formations
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH