Learn how to make a fly fishing leader by following this tutorial. First, the easiest way is to purchase a tapered leader, obviously. However, sometimes as you are fishing this will break and you may not have a backup leader. Your only option in that scenario is to make a new one from your broken leader. Take approximately 18 to 24 inches of the 3X wire and double knot it to the but section that is broken. Then use another wire material to attach for the fly section. To decide what type of material to use is simple. You want to make sure it is a lighter section. It should not be a heavier section than the but section.