Riyo 925 Sterling Silver Fish Lock Clasp with Open Jump" refers to a jewelry component made from 925 sterling silver. It consists of a fish-shaped clasp with an open jump ring attached to it. The clasp is designed to fasten and secure jewelry pieces, such as necklaces or bracelets, by connecting the jump ring to a corresponding link or loop. The fish lock clasp adds a decorative element to the jewelry while ensuring its proper closure.