Cylindrical Rotary File 6mm Shank Diameter Grinding Head Carbide Diameter 6-16mm. Model: Cylindrical Rotary File 6mm Shank Diameter Grinding Head Carbide Diameter 6-16mm. Material: Hard alloy tungsten steel material. Surface treatment: Please see the picture for specific details. Size: Blade diameter:6mm-16mm(Please see the picture for specific details). Scope of application:Widely used in mechanical polishing, polishing, chamfering and craft carving. The cutter head is made of cemented carbide material, which has high hardness, good wear resistance/toughness, heat resistance and corrosion resistance. Single and double slot design, Single slot is suitable for harder materials such as metal, Double grooves are suitable for softer materials such as wood, plastic, aluminum, etc. Please according to your choice, thank you!