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