This is a figure eight clasp, infinity style, sterling silver; two sizes available; Double interchangeable clasp. One Latch opens two Claws at once. This has a lever that opens both rings of the clasp; it is a versatile lobster claw clasp that explores its creative possibilities for many jewelry designs. Try in bead strands as a shortener or enhancer, and attach interchangeable charms and pendants for various fashions. This item is medium size. Please contact us via amazon buyer-seller messaging if you need free split rings to adapt your double clasp to your necklace. A double lobster clasp is a type of fastener used to secure jewelry, such as a bracelet or necklace. It consists of two lobster claw-shaped clasps joined together, with one end attaching to the jewelry and the other attaching to a chain or cord. The double lobster clasp is designed to provide added security and stability, making it particularly well-suited for heavier or more valuable jewelry pieces. To use the clasp, the wearer simply slides the two lobster claws together and releases them to secure the jewelry. The double lobster clasp is a popular choice for jewelry makers and consumers because it is easy to use and provides a secure hold.