I don't know how to describe this. Take a ring, like a jump ring soldered shut, not a finger ring. Put another ring into it at right angles - looks like an 'X' in end view, circle with a line across middle from the side. I could take two rings and a soldering iron and make one of these, but the problem would be finding a ring of correct size to fit within the other. If the same size one would need to have a slight flattening or indent on opposite sides.
Can anyone figure out what I'm trying to describe? If so, anyone ever see these? Prefer plated, not silver or gold (too expensive for enough of them for my objective). I suspect I'll have to make my own.
TIA
Ken