Sterling silver bolt ring clasps are a type of jewelry clasp, typically found on necklaces. Such clasps can be used to secure necklaces, bracelets, and other types of chains. When the clasps are closed, they form an almost unbreakable bond by having half of their rings interlocked with the other half. The backside of the clasp is typically made up of two metal pieces that protrude outwards, generally with one side having a slight lip, and the other being flat.