Sichuan TOSI is the newest manufacturer of rock drilling tools for the mining, exploration, construction, water well, oil, and gas industries based in Chengdu City, China. we strive to provide the highest quality roller cutters worldwide. With 20 years of combined experience in the design, manufacture, sale, and service of drilling tools. All kind of Roller Cutters has been producing such as four row RBM Cutter, five row RBM Cutter, Nubby Cutter, Tunneling Cutter, Steel Cutter, RCD Cutter and any kind of cutter with tungsten carbide. Get ISO-9000 certified, manufacturing company, sells well to South Africa, America, Brazil, Peru, Hongkong, Taiwan, etc. Our products are recognized in the industry.