Same great benefits as the Rafter 6?, PLUS it also prevents the roller from sagging toward the ground while extended. If you already own a Rafter 4?, 5?, or 6?, its existing bracket will allow you to easily add a Ground Support. All you have to do is order a Ground Support Add-On. Works on all awning brands. NOTE: Rafters do not safeguard awnings from water pooling. Use rain release setting on patio awning to provide for water run-off. Two year warranty on parts, labor and freight.