QL series Abrasive Tools Mainly used in medium carbon steel, alloy steel, hardened steel, carbonized steel, chrome steel, nickel steel, carbonitriding steel, various types of cast iron and other materials. Our stones are suitable for most applications requiring Honing and are used in honing Abrasive Tools Our honing tools are typically designed for American Sunnen horizontal & vertical honing machine Application: ? Engineering hydraulic cylinder, ? Cylinder oil field pump, ? Coal mine hydraulic prop, the engine liner, ? Military guns and other deep hole boring and processing areas. Specification: Materials: White Aluminium Oxide, Black Silicon Carbide, Green Silicon Carbide and so on. The grits and sizes can be done as the customer's requirements. We are a professional honing stome supplier, we can do different shape. oil stone, sharpening stone, honing stone Welcome to?visit our webside: http:// www.qonly.net ?