Package Include:20 x Carbide Rotary File1 x Plastic BoxSpecifications:Features: - Machinable metal (including hardened steel) and non-metallic (such as marble, jade, bone), processing hardness of HRC70.- In a large part of the work can be replaced with small grinding wheel, and no dust pollution.- High production efficiency, than with the file processing efficiency, than with a small handle with a small processing efficiency.- Product processing quality, high finish, can be processed into a variety of shapes mold cavity.- Long life, higher than the high-speed steel tool durability, higher than the durability of small grinding wheel.- Easy to use, safe and reliable, can reduce labor intensity, improve the working environment.Model: Carbide Rotary File TungstenType: 3 x 3mmMaterial: Tungsten + CarbideColor: SilverHead Diameter: 3mmShank Diameter: 3mmQuantity: 20pcs