The silver rings are actually upcycled from junked computers. They are the aluminum spacers that are part of the hard drive...you probably care very little about what they actually do and more about how light and fabulous they are as findings, though! I hammer the bejeebers out of them than with a ball peen hammer and then wire them up. Fun, right? And much better than throwing it away! What kind of things do you upcycle and give new life?