Preferably, {TAIL ~ said stirrup} includes a pair of spaced arms, each arm having one end pivotal about said pivot axis, and {HEAD ~ a transverse bar} interconnecting the respective other ends of said arms 
Preferably , { TAIL ~ said stirrup } includes a pair of spaced arms , each arm having one end pivotal about said pivot axis , and { HEAD ~ a transverse bar } interconnecting the respective other ends of said arms
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH