The WindMaster® Sign Stand is designed to accommodate all 36" and 48"MDI Compact signs. It features a dual-spring base design with strong initial tension that resists twisting and turning of the sign in high wind gusts. The Drop & Lock upright features a molded cap that helps to channel the MDI crossbrace into the upright and a spring-loaded pin automatically locks the sign in place. Store as one with the MDI Compact® sign for fast and easy deployment. Adjustable legs for stability on curbs and uneven terrain. Full 4-year warranty.