1 Yard Black Iron Side Twist Link Chains 9x7.5mm Jewelry Findings for Necklac... Quantity: 1 Yard Iron Side Twist Chain, Lead Free, Black Size: Chain: about 9mm long, 7.5mm wide, 2mm thick Strong and economical iron chain is a popular alternative to precious metals. They can be matched with jumprings and clasps, as well as acrylic beads, glass beads, gemstone beads to be popular necklaces, bracelets and belts. They also can be used as separate extenders and dangles.