High end copper vs high end graphite...which to use and why! Let's compare. Steve typically uses Graphite for electrodes at Zero Tolerance. Why? Because the material is easy, fast and it's what Steve used to learn in this trade. Copper isn't typically used for electrodes at Zero Tolerance, but today, he is going to explore! Come along to learn more about the characteristics of each material. Are there any EDM topics you wish to see? Drop them in the comments! | Practical Machinist