Chengdu Tool Research Institute Co.,Ltd(CTRI) is a professional manufacturer of carbide cutting tools in China, enjoying a high prestige in China's tool industry. Founded in 1956, our company has more than 500 employees. With strong technical force, we can supply you different kinds of quality products, such as Carbide API Chasers, Indexable Carbide Threading inserts, HSS chasers, CBN and PCD inserts, Ceramic Inserts, Bar Peeling Inserts, Wheel Re-turning Inserts for railways, Carbide Scarfing ...