Since prehistoric times, the healing and holistic properties of copper and magnets are believed to relieve arthritis pain and improve circulation as well as increase the wearer's life force, known as chi. Our California artisan handcrafts this copper twist bracelets the old-fashioned way, using the purest copper available, jewelers brass (an alloy of 85% pure copper, 15% zinc) and German silver. Adjustable to fit most.