{TAIL ~ A movable stirrup} on {HEAD ~ the binding member} is resiliently biased to a neutral position 
{ TAIL ~ A movable stirrup } on { HEAD ~ the binding member } is resiliently biased to a neutral position
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH