Copper bonded steel grounding wire coil is a bimetallic composite material composed of an internal steel core and an external copper layer. It not only has high mechanical properties of steel, but also has good electrical conductivity and corrosion resistance of copper. In terms of product form, we use a single individual package with a length of 100 meters, which contains all the physical properties of the copper bonded steel ground rod and the length advantage of the copper bonded steel strand. We have two types of structures——round wire and tape, to meet the needs of different places in the project.