The Rock Solid is the effective way to reduce the costly damage that road debris cause to your towed vehicle. The Rock Solid's design allows air to flow through the vented flaps, but sturdy enough to stop rocks or small road debris. The Rock Solid is available in two sizes and installs easily onto your pick-up or RV. The motor home model attaches permanently to the coach while the truck/SUV model mounts to a two Inch receiver hitch and is easily removable.