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