{HEAD ~ A hollow tubular pivot} is attached to {TAIL ~ the inner end} of one of the jaws with open opposing ends 
is attached to
{ HEAD ~ A hollow tubular pivot } is attached to { TAIL ~ the inner end } of one of the jaws with open opposing ends
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH