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