Yantai Qonly Honing Application Co., Ltd. is a powerful professional manufacturer of honing stones. Our company for many years,has been committed to a comprehensive study of honing process, and our products are widely used in engineering hydraulic cylinder, cylinder oil field pump, coal mine hydraulic prop, the engine liner, military guns and other deep hole boring and processing areas. We have strong technical force,advanced production technology and professional formulation.

With high ...