The Dual Byzantine weave, made using beautiful cold hard stainless steel. Along with bronze, steel is one of the hardest of the heavy metals I work with. The price is therefore slightly higher than the same thing in aluminum, brass, or copper. But the bracelet is more durable as well. Stainless steel won't rust nor darken with age, keeping its bright, clean look for years to come.This braclet is held closed with a silver-colored magnetic tube clasp.