The company that invented fluorocarbon now introduces the world's strongest fluorocarbon. In a side-by-side tensile strength comparison, Grand Max tested up to twice as strong as other leading brands. The refractive index (a measure of visibility) was actually lower than competitive brands, which means that it is even less visible in water. It is not stiff and kinky like other leader materials and memory is relatively low. Also of note is the exceptional knot strength and it is exceptionally abrasion-resistant. It is perfect for fishing around rocks, bridges, over wrecks, reefs or other structures.