Die grinders and rotary tools are handheld power tools used for grinding, sanding, honing, polishing, or machining material (typically metal, but also plastic or wood) Die grinders are often used for engraving, cylinder head porting, and general shaping of a part. Bosch GGS 3000 300-Watt L-Die Grinder is an industrial grade product. This product is suitable for processing cavity molds, jigs or complex parts which are uneasy to processing on grinder or special equipment's. It is also used for grinding and polishing of varieties of metal mechanical surfaces.