Diamond Tech electroplated wheels consist of a single layer of super abrasive particles bonded to the wheel by a hard nickel matrix. The bonding process allows the manufacture of wheels with various forms and contours. Vertically grinding pre-forming wheels are available in many sizes, shapes, and meshes. Pre-forming wheels can be used for shaping or careful fine grinding. The thinner wheels are used with calibrating and shaping machines while wider wheels are more useful for larger stones. Many cutters prefer vertical rotation which allows them to hold the work piece from the side and look down and grind comfortably at the same time.