The hinged connection between the jaws of the second clamp allow the second clamp to move from {HEAD ~ the closed position} to {TAIL ~ the open position} 
The hinged connection between the jaws of the second clamp allow the second clamp to move from { HEAD ~ the closed position } to { TAIL ~ the open position }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL