Alpina Manufacturing designed and created the Edge Grip Sign Holder, a new sign holder suitable for aluminum graphics. The Edge Grip Sign Holder is a simple and attractive solution for sign displays. In outdoor settings, signs will flex and deflect high winds to keep graphic in . Alpina’s patent pending design prevents screws from unscrewing too far or falling out. For more information about the Edge Grip Sign Holder, visit. (Web Site) www.fastchangeframes.com