Aventik Fly Fishing Fly Line Leader Straightener & Line Cleaner EVA leader straightener fly fishing leader straightener is great for remove coils out of a fly fishing leader. It also can clean leader. Leather leader straightener Fly line clean/ line straightener High quality leather material classic dark brown color. With a D-ring for easy attachment to a clip on your jacket or vest. Pull the line, tippet or leader through the felted sides with or without adding a few drops of line care solution, soon clean, remove the memory in the line, and decrease glare for fishing.