A needle passes through {TAIL ~ the hollow applicator and tack bore} to project from the distal end of {HEAD ~ the tack shaft} 
A needle passes through { TAIL ~ the hollow applicator and tack bore } to project from the distal end of { HEAD ~ the tack shaft }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD