* Metal: 14K Gold Filled - Yellow * Length: 12 mm * Width: 7.5 mm * Clasp Style: Trigger Clasp * Jump Ring: Open * Compatible Jump Ring: 20 Gauge * Finish: Shiny Open Jump ring size is 4.6mm, 20gauge. Clasp Length without Jump ring: 12mm Total Clasp Length: 14.2mm Clasp width: 7.5mm Like Spring Rings, Lobster Clasps are held closed by a spring. Unlike Spring Rings, the closure is a strong pincer-like 'lobster claw' that opens with a small trigger lever, and closes shut on a jump ring or flat pierced tab. 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. Stamped 14K 1/20.