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