{HEAD ~ A pair} of {TAIL ~ 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 
{ HEAD ~ A pair } of { TAIL ~ 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
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH