Make the Connections
For a 12- to 14-inch finished leader, start with a 24-inch piece of fluorocarbon and simply tie one end to the swivel, the other to the snap. Keep in mind, though, that Palomar and cinch knots are nearly impossible to tie with such heavy line. I use what's called a Centauri knot, which is very easy to learn. You can also use crimps to make the connections, in which case you can start with an 18- to 20-inch piece of fluoro.