Frog Hair's EZ-ON Indicators incorporate a quick and easy line threading system that allows for fast, strategic and secure adjustments on all knotless leaders without leaving marks or a residue on the line. The highly visible, highly buoyant indicators cast extremely well allowing you to easily determine the level of presentation or drift speed. Our pro staff prefers the medium size for most conditions but the large size works extremely well for fast, swift currents with heavy nymph rigs. A selection of both would be our recommendation.