The WindMaster® 4818®K is designed to accommodate roll-up, aluminum, plywood, plastic and aluminum laminate signs (sign mounting brackets are required and are sold separately). The 4818®K has dual-springs for wind resistance. The legs are equipped with kick-release buttons for easy set-up and take down and are adjustable to accommodate uneven terrain. It features our patented BreakAway® system, which allows vertical upright to break away from the stand on impact. The 4818®K comes with a flag holder bracket that holds three wooden dowel flags (flags sold separately).