Globe Piper Hanger Products manufactures a rather unique application. The Concrete Insert Box is a heavy gauge structural box attachment used in all grades of concrete for concrete structures where rods are needed for the subsequent installation of pipe hangers. The Concrete Insert Box has a knockout piece that keeps the box empty and clear of concrete during the pouring process. We also offer a corresponding Insert Nut to install once the knockout piece is removed. The insert nut is installed and fastened to the rod.