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The butt section of a leader is pretty heavy mono +8 lbs. Fly Line typically has a +20 lb core and backing is +20 lbs. This isn’t usually an issue in freshwater situations. I RECOMMEND one that can be found at AMAZON HERE -> Tie-Fast Knot Tyer For usually around $10 you can get one of these tools. Using a nail knot tool makes tying easier and opens up more opportunities for uses, I’ve tied this knot without a tool and you really feel like you need a third hand. I’m sure that with a little more time I’ll learn another use for this secret weapon. Leader to fly line, loops for loop to loop connections and fast snell knots for hooks. I keep discovering more uses for the nail knot. I’ve found that having a long tag line helps and quickly pulling the knot off the tool helps. One of the negatives to the nail knot is the learning the tying technique. I’ve also used a nail knot to create a loop for loop to loop connections. The design of the knot allows it to squeeze tighten more as it is being drawn down. The nail knot excels when joining to dissimilar diameter lines. The nail knot is used to attach the backing to fly line and fly line to leader. This bunching of loops “squeezes” down onto the joining line.
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The nail knot fastens by bunching up 5 or more loops onto the joining line. The nail knot is very flat and will easily slide through the guides of a fishing rod. Use nail knot for line to backing and line to leader What is a Nail KnotĪ nail knot is used primarily in fly fishing to join to dissimilar diameter lines.