Application: Carbide burrs set is suitable for grinding and polishing cast iron, cast iron, carbon steel, alloy steel, stainless steel and other materials.Matching: The cylinder head porting kit is usually used in conjunction with a hand held electric or air tool driver (can also be used in machine tools). High Polishing: Carbide burrs set has good quality and high polishing degree, which can process high accuracy mold cavities of various shapes. Finishing: Cylinder head porting kit has high efficiency, high quality finishing, long service life and good economic benefits. Tungsten Steel Material: This carbide tip is made of high quality tungsten steel, high hardness, durable and long service life. Specification Item Type: Carbide Burrs Set Material: Tungsten Steel Color: Silver Shank Type: Approx. 6mm / 0.2in Round Shank Maximum Cutting Diameter: Approx. 10mm / 0.4in Grinding Head Hardness: 85HRA Product Length: Approx. 150mm±10mm / 5.9±0.4in (The Length is within this range) Applicable Scene: Hand Held Electric or Pneumatic Tools (Can also be used in machine tools) Uses: Suitable for Grinding and Polishing Cast Iron, Cast Iron, Carbon Steel, Alloy Steel, Stainless Steel and Other Materials Package List 6 x Carbide Burrs Set 6 x Storage Box Note: Please wear protective equipment when using.