* Metal: Sterling Silver * Length: 9 mm * Width: 5 mm * Clasp Style: Oval Clasp * Jump Ring: Closed * Finish: Shiny Like Spring Rings, Lobster Clasps are held closed by a spring, but the closure is a strong pincer-like 'lobster claw' that opens with a tiny trigger lever, and snaps shut on a jump ring or flat pierced tab. This .925 sterling silver version is a small but sturdy clasp with a closed ring. Use for heavier chains and gemstone bead strands. Closed Ring size is 2.5mm (Outside dimension) Clasp length without ring is about 6.5mm. Clasp Width: 5mm Stamped 925. Lobster clasps are often used for medium-to-heavy chains and beading lines, for heavier necklaces, bracelets, and keychains. Their claw mechanism can be shaped as a square, oval, teardrop, or other form, depending on the desired use and aesthetics.