When the elongate body is driven to advance towards a material, the drill member is operative to drill {HEAD ~ a hole} through {TAIL ~ the material} 
through
When the elongate body is driven to advance towards a material , the drill member is operative to drill { HEAD ~ a hole } through { TAIL ~ the material }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL