This 21° angled bracket mounts securely onto any metal, wood or plastic A-frame style (sandwich board) signs to keep your balloon standing straight up. The stem twist locks on/off as needed for storage and portability (not included). Add multiple brackets on your sign for a staggered cluster of balloons! This product includes 2 mounting screws. The Universal A-Frame Bracket is compatible with all Premium Outdoor Extreme product lines. Made in the USA.