Can process cast iron, cast steel, carbon steel, alloy steel, stainless steel, copper, aluminum and other metals, and marble, jade, bone and other non-metal. It can basically replace small grinding wheel with handle, and no dust pollution. Good processing quality and high finish. Can process a variety of high precision shape mold cavity. Easy to grasp, simple to use, safe and reliable. Suitable for polishing metals and plastics, jewelers, lapidary use, hobbies, crafts, craft modeling, home repair and so much more.