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