Getting the leader onto the end of your fly line involves some intricate procedures. Various tools, techniques, and tried-and-true methods exist. The oldest method is the nail knot, which effectively captures the fly line with a complex maneuver. The leader is wrapped around the fly line, and a tool or common nail is used to leave an opening to finish the knot. Once cinched and finished, it forms a usable attachment. However, this method has its drawbacks. The leader needs to be removed due to wear and tear, and the end of the fly line is cut, revealing the limitations of this approach.
Another method is to weld a permanent loop onto the fly line using a stout piece of leader material, typically 8-12 inches long. The end of the leader is formed into a perfect loop. Since most premade leaders come with a loop on the butt end, a loop-to-loop connection can be made. Flexible loop connectors, resembling Chinese fingers, are used to place over the line. These devices are fed over the line to capture it, and a small piece of heat shrink is used to keep the connector in place. Caution is advised when using an open flame; a hair dryer is a better alternative. As with all types of connectors, regular visual inspections are necessary, and if in doubt, replacement is recommended.
A few essential knots every angler should know are the nail knot, double surgeon knot, blood knot, Davy knot, improved clinch, and perfection loop. While you don’t need to master every knot, it’s crucial to learn the ones you use daily. Practice until you can tie them even in the dark and blindfolded. Remember, conditions are never perfect, so take your time and don’t rush. After every fish, always test the knot used to attach your fly.