Solid carbide end mill is usually used for machining metal. Our GM550 series is recommended to process carbon steel, alloy steel, cast iron, ductile iron and copper and other materials below HRC25, which is suitable for rough machining of ordinary steel parts. Our GM650 series is recommended to process materials below HRC45, pre-hardened steel, carbon steel, alloy steel, cast iron, stainless steel, which is suitable for roughing and finishing of small feed parts. Our HM Series is recommended to process materials below HRC50, which is suitable for mold steel, plastic mold, cast iron, copper, stainless steel, titanium alloy and other difficult-to-machine materials, efficient processing of ordinary steel parts, large depth of cut, and large removal amount of milling processing.