{TAIL ~ First and second arms} are provided for connecting said ring top to {HEAD ~ corresponding locations} on said first and second arcuate elements adjacent to said opening to allow said ring top to be displaced to expand and contract said ring shank while an overall round configuration is maintained 
{ TAIL ~ First and second arms } are provided for connecting said ring top to { HEAD ~ corresponding locations } on said first and second arcuate elements adjacent to said opening to allow said ring top to be displaced to expand and contract said ring shank while an overall round configuration is maintained
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH