4.8mm (Large) white plated brass ball chain clasps, for use with 4.8mm bulk ball chain. White plate is the "silver" color most often seen on base metal jewelry and findings. White-plated components are generally grayer, but also more durable, than silver-plated components. White plating is also known as "imitation rhodium" and "silvertone". These clasps hook both ends of the chain together, to make a necklace or a key ring. If the clasp appears too tight to fit on your chain, gently loosen the clasp with an awl or chain-nose pliers.