{HEAD ~ The drive element} engages {TAIL ~ the top} of the foremost fastener of the strip of fasteners to force the fastener into a work piece 
engages
{ HEAD ~ The drive element } engages { TAIL ~ the top } of the foremost fastener of the strip of fasteners to force the fastener into a work piece
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH