These leaders are designed for use with sinking tip lines of all kinds. By the time you nail-knot a six-foot leader to the end of your line & tie on a fly you will have a leader of about 5' long. This allows a couple of fly changes before the leader shortens to 4'. Each leader is made from hard, abrasion resistant nylon favored for anadromous species. Great turnover and presentation for all sizes of flies commonly fished for steelhead and Atlantic Salmon.