hitechpower 0 Copper Grounding Rods Features: “HEX” copper bonded earth rod are made from low carbon steel of grade BS 970 or AIS11018 with a high tensile strength of atleast 600 N/mm2.Low carbon steel core are molecularity tended with 99.9% pure electrolytic copper.Perfectly bonded rod will lost longer, drive easier and will not crack.