The fastener of the present invention is rotatable by a drive gear for engagement with {HEAD ~ a workpiece} in {TAIL ~ a preselected forward direction} 
in
The fastener of the present invention is rotatable by a drive gear for engagement with { HEAD ~ a workpiece } in { TAIL ~ a preselected forward direction }
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 TAIL TAIL