Features Multi Purpose: Rotary file bit set is widely used for polishing the impeller channel, grinding the hole to an accurate shape, also suitable for wood carving, jewellery making, welding, etc. Wide Application: Die grinder bit is suitable for copper, aluminum, steel, marble, wood and other materials, can also be used in machinery, aviation, automobiles, ships, etc. Durable Carbide: Heavy duty Rotary File Bit is made of superior carbide materials which has high strength and toughness, excellent wear and heat resistance, long lasting to use. Compatibility: Can be used with pneumatic or handheld electric drive tools for higher working efficiency, stable performance and convenience. Compact Size: Advanced carbide grinding head comes with simple and sturdy structure, small and lightweight, easy and convenient to store and transport with minimal space required. Specification Item Type: Rotary File Set Material: Carbide Package Includes: FX0616M06, FX0818M06, FX1020M06, FX1225M06, FX1425M06 Note: Letters represent the international number of this product. The first two digits indicate the diameter of the cutter head, the third and fourth digits indicate the length of the cutter head. M06 indicates a 6mm shank diameter (unit: mm) Application: Machinery, aviation, automobiles, ships, etc. Package List 5 x Rotary File Bit