If you're looking for the quickest and easiest way to finish off your fly and give it a professional appearance, then you need the Dr. Slick Whip Finisher. This handy little tool is available in two sizes - 4-inch for small to medium flies, and 6-inch for larger flies. Simply slide the Whip Finisher over the end of your fly line and give it a few wraps. That's it! Your fly is now ready to fish.