For any 4 to 10 inch wide short vertical wall, the Safety Maker ParaShield™ makes installing a temporary guardrail fast and easy. Drilling is eliminated. Simply adjust ParaShield™ to the desired width, pinning it into position and tightening an integral bolt. Unique dual socket design accommodates either double 2 x 4 posts or one-inch steel stanchions. Safety Maker, Inc.,, (800) 804-4741. Circle 275clamps