Description For temporary installation on any steel surface. Sign Backer consists of welded steel frame with powerful rare earth magnet in back and grab handles in front. Bolt any 12" x 15" sign plate to frame. Attach to end of railcars, couplers, posts, or building walls. Magnet resists gale-force winds. IMPORTANT: Magnetic Sign Backer is designed for 12"x 15" sign plates ONLY. Sign Plate is NOT included. View OSHA-Mandated Blue Flag Sign Plates View All Compatible Sign Plates Weight: 4 lbs.
