ESK302 Xtreme Fly Bar Control Ring(for King 3, Belt CP V2). With the standard fly bar control system, there is chance that the two flybar control arms shift out alignment. You have to look closely when trying to get them level and the alignment may be changed after a flight. With the Xtreme system the one-pieced fly bar control rings will be always in a perfect straight line alignment. Control of the fly-bar is now more precise and accurate.