3x11mm fold-over clasps. Plated brass. White-plated jewelry components are generally grayer, but also more durable, than silver-plated components. White plating is also known as "imitation rhodium" and "silvertone". Fold over clasps are popular for bracelets and watches because they can be clasped with one hand. Carefully close open loop around jump ring; clasp may not stay closed if loop is bent too far.