The improved clinch knot, sometimes called the fisherman’s knot, is what I’d call a necessary oddball. Best Fluorocarbon Knot Improved Clinch KnotWhen to Tie the Improved Clinch KnotThe improved clinch works best when tied with monofilament or fluorocarbon line. How to Tie the Improved Clinch Knot, Step-by-StepStep one for making the clinch knot. Read Next: How to Tie a Fishing Knot: The 9 Best Knots for FishingWhat About an “Unimproved” Clinch Knot? The plain, old clinch knot has been around longer than the improved clinch, and the only difference between the two is step four in the process outlined above.