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