The Caldwell AR500 Plate Rack Kit brings competition-style targets to home range. Each kit includes Three – 8 diameter targets with hanging brackets and 2 steel 2×4 frame hubs. The targets and target brackets are constructed of rifle-rated 3/8 AR500 steel for use with handguns and centerfire rifles. The steel frame hub brackets use standard 2×4 lumber (not included) to construct a customizable frame size that is easily expanded with the target expansion kit (sold separately).