Features: 1.Multi Purposes: Rotary burr file can be used for woodworking, engraving, carving, polishing, helping you get things done more easily and quickly. 2.Universal Application: Carbide rotary burr set can be widely used in aviation, automobile, boats, marines and so on, safe and dependable in use. 3.Different Size: The kit includes 5pcs rotary burr files with different sizes, they can be used with handheld electric or pneumatic tool drive. 4.Durable Material: Rotary burr bits are made of carbide, higher durability, high temperature resistance, high strength, and can be used for a long time. 5.Dual Cut Design: The double cut will leave a smoother finish, the high strength super sharp cutting teeth, high efficiency, and the working time is saved. Specification: Item Type: Carbide Rotary Burr Set_x000D_ Material: Carbide_x000D_ Color: Silver_x000D_ Kit Includes: CX0616M06, CX0820M06, CX1020M06, CX1225M06, CX1425M06_x000D_ Size:_x000D_ CX0616M06 shank diameter is 6mm / 0.24in, cutter head diameter is 6mm / 0.24in_x000D_ CX0820M06 shank diameter is 6mm / 0.24in, cutter head diameter is 8mm / 0.31in_x000D_ CX1020M06 shank diameter is 6mm / 0.24in, cutter head diameter is 10mm / 0.39in_x000D_ CX1225M06 shank diameter is 6mm / 0.24in, cutter head diameter is 12mm / 0.47in_x000D_ CX1425M06 shank diameter is 6mm / 0.24in, cutter head diameter is 14mm / 0.55in_x000D_ Applicable Models: Suitable for aviation, automobile, ship surface grinding, etc.