... rotary file is also called carbide high speed cutter, carbide mould cutter, carbide rotary burrs, carbide rotary burs, carbide ... milling cutter, tungsten carbide rotary burrs, carbide burrs, hardmetal burrs, super hard tools, carbide tools, tungsten steel grinder, solid ... the durability is ten times stronger than high speed steel cutter, and more 200 times than small grinding wheel.5. ...