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. Tungsten Steel Material: This carbide tip is made of high quality tungsten steel, high hardness, durable and long service life. 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). 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. 6 x Carbide Burrs Set. 6 x Storage Box. Please wear protective equipment when using. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.