The Adir Vertical File Rolling Stand with 12 Brackets provides convenient hanging blueprint storage. The brackets swing out wide so you can access your blueprints, plan drawings, maps, or other large documents. The brackets accommodate any size clamp, so you can fit documents in a variety of sizes onto this mobile blueprint stand at the same time. (Clamps are sold separately). Made of solid steel, this mobile blueprint rack is adjustable with a 240 lbs. weight capacity (20 lbs. per bracket).