Also known as lobster claws, bocklebee clasps or lobster hooks, lobster clasps are self-closing fasteners that attach to a piece of jewelry and allow it to open or close.

The lobster clasp is opened or closed by holding a small lever, usually with a fingernail, long enough to apply, then it is attached (or removed from) a short link-chain or a ring-like structure. Lobster clasps are often used for necklaces, bracelets, and keychains.

They come in a variety of shapes, sizes, colours.