... , have many foreign customers 2.specialize in producing stone polishing tools 1.stone polishing tools be written according to the order, shape, size, abrasive ... -speed steel, High-carbon steel,Chromium corundumPAPink,rose-red Sharp cutting, good edges holdout, durableSuitable for form grinding, knives, Measuring ... weak Tensile strength metallic and Nonmetallic material, i.e. stone polishing tools