Material Origin / Manufacturer Executive Standard Grade: NA30 Features: Shock NA30 uses: impact resistant tungsten steel tool used for cutting cast iron, nonferrous metals, plastics, chemical fiber, graphite, glass, stone and ordinary steel can also be used to cut the heat steel, stainless steel, high manganese steel, tool steel and other difficult to machine materials. New carbide cutting speeds hundreds of times equal to carbon steel. Can also be used to make drilling tools, mining tools, drilling tools, measuring tools, wear parts, metal grinding, cylinder liners, precision bearings, nozzles, etc.,