Selection of quality diamond tungsten steel, high hardness, headstrong good, good abrasion resistance, and sharp, continuous line, not chipping knife round holes on both sides of the face and edge in the special high-precision machine tools for precision machining , high precision cutting, trimming, beautiful, long service life. The product is the ideal cutting tool of the quartz tube glass, flat glass, glass ceramics, utensils, glass, ceramic tiles, etc., but also long-term knife round the edge repair services.