UNI KNOT - Fishing Knot The uni-knot (clinch knot, Berkley knot) is an all time favorite for tying line to a hook, lure or swivel Strong, reliable, and easy to tie, the Uni-Knot is an excellent knot for securing line to terminal tackle. It's also the foundation of the entire Uni-Knot system. Note that the Uni-Knot can be left as a loop or tightened down so it's snug to the hook eye