When you take a closer look at the costs of copper bonded earthing rods versus solid copper rods, you'll notice a pretty big price gap, and that's mainly due to the materials used and how they're made. Copper bonded earthing rods, like those from Pioneer Power International, have a sturdy steel core wrapped in a thick layer of copper, while solid copper rods are made entirely from cop... https://www.pioneerpowers.com/copper-bonded-earth-rod.php