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