Carbide rotary burr set for surface grinding and deburring1、Multiple Function: Rotary file bit set is designed to polish the impeller channel, grind the hole to an accurate shape, also suitable for wood carving, jewellery making, welding, etc. 2、Wide Range of Usages: Die grinder head is suitable for copper, aluminum, steel, marble, wood and other materials, can also be used in machinery, aviation, automobiles, ships, etc. 3、Durable Materials: Single cut rotary file bit is machined from advanced carbide materials which has high strength and hardness, excellent wear and heat resistant, long lasting to use. 4、High Efficiency: You can use the durable carbide grinding bit tool with pneumatic or handheld electric drive tools for higher working efficiency, stable performance and convenience. 5、Compact and Portable: Superior grinding head comes with simple and sturdy structure, small and light weight, easy and convenient to storage and transport with taking up less space.