RoadWing’s "anti-sail" design keeps the mud flaps down, where they can stay on the job - double-bolt attachment points hold the system in place, as well as level on the bevel, and grooved interior channels deflect rocks, gravel and road debris down and away from your towed vehicle or trailer. The RoadWing slides over your ball mount or tow bar stinger, and is easily attached with set bolts, or just as easily detached.