A jewelry string is looped around {HEAD ~ the pins} and clamped in position by {TAIL ~ the clamps} 
A jewelry string is looped around { HEAD ~ the pins } and clamped in position by { TAIL ~ the clamps }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL