Sunline FC System Shockleader Fluorocarbon100% Fluorocarbon leader, highly tensile even for predatory fish. Excellent in rocks. Limited damage to fishing line. Original low extension design can be fully applied for a perfect transfer of movement to jigs or lures to hook a fish. Even of its fluorocarbon nature, it can stand for a big shock due to its smooth and tenacious features. Knotting with this leader brings a much better experience. Parallel spooling is adopted to decrease line surface