Gamakatsu Superline Swivel - The Gamakatsu Superline Swivel is manufactured in Japan from premium components offering a superior strength to size ratio and an NSB (nickel silver black) coating is applied for a stealthy finish that resists corrosion. Swivels are available in sizes 8 to 2, with break strengths of 50 to 230 pounds. Whether you chase Bluegill or Bigeye, Gamakatsu has a swivel for you.