Carefree 902865WHT Rafter 6 GS Automatic Awning Support Plus Ground Support, White/White Castings. Automatic Awning Support PLUS Ground Support. Works on all brands. Tightens your awning while camping and supports the awning roller while traveling. Make the canopy as tight as you want. Stores on or inside your RV. The Rafter 6 GS provides an additional advantage: The Ground Support feature prevents the roller from sagging while extended. They work in combination to keep your roller straight.