This white 2.25" Boot System Magnetic Base is a versatile sign holder system that is capable of displaying materials up to 1/4" thick on metal surfaces when coupled with the extruded Thin Poster Channel or Heavy Duty Gripper Poster Channel (both are sold separately). Boot shaped base is removable and can be re‐positioned to accommodate signs of any size or shape. Simply choose the proper channel for the sign thickness, insert the channel into the base and then insert the sign.