It is a solid bar that has a square cross section. This type of bar is used in a wide range of industries, usually for building, fencing, manufacturing and general assembly. In addition, iron square rod is used to repair and install railings and plant equipment. Other products include ironwork, gates, and window guards. The high strength and versatility of this material-built rod make it ideal for drilling, welding, and cutting. Square rod is made of iron of different grades and specifications. Synergy World produces iron square rod in a variety of sizes.