A rotary drilling tool has {HEAD ~ a plurality} of cutters mounted on the tool body and formed with cutting edges defining {TAIL ~ a cutting profile} 
A rotary drilling tool has { HEAD ~ a plurality } of cutters mounted on the tool body and formed with cutting edges defining { TAIL ~ a cutting profile }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL