{TAIL ~ A pair} of {HEAD ~ relatively rotatable face} to face metal swivel plates centrally secured together adjacent the common center axis and arranged along their respective margins for respective securement to an article and the base 
{ TAIL ~ A pair } of { HEAD ~ relatively rotatable face } to face metal swivel plates centrally secured together adjacent the common center axis and arranged along their respective margins for respective securement to an article and the base
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH