CBN or Cubic Boron Nitride grinding wheels are electroplated and nickel coated. Electroplating offers many advantages over other applications. It creates a more aggressive bond over other applications and will hold a form longer. It also performs a higher stock removal rate and will last for years. They are designed for sharpening wood band saw only and should not be used for other applications. if u are in need of woodmizer 10/30, we can send to u immediately now.