This essential tool simplifies the process of connecting fly lines to tapered leaders. By splicing the tapered leader into the fly line and using the included pipe to tie a nail knot, you create a compact, low-profile connection that won&&';;t catch in the rod&&';;s top guide. This reduces interference when stripping line, reeling in a fish, or pulling line through the guides-resulting in a smoother, more comfortable fishing experience. A small magnet attached to the end of the nail-knot pipe allows you to easily retrieve flies from a compartment box and can also hold flies securely when changing patterns by hanging the tool from your chest.