STROFT FC 1 has probably the highest linear breaking strain that has ever been achieved with a 100% Fluorocarbon fishing line. The knot strength is carefully tuned for the best possible values for each diameter. Because of this very important feature and the other useful characteristics of STROFT Fluorocarbon, such as abrasion resistance, sinking performance, sensitivity, responsiveness, strike- elasticity, tippet castability, durability and visibility/invisibility, STROFT FC 1 is ideal for all kinds of rigs. STROFT FC 1 can also be used as a mainline, of course.