5Pcs Rotary Files 1/4 6mm Shank Tungsten Carbide Burr Milling Cutters Grinding Mill Shank Set Engraving Drill Tool Kit Feature:Carbide rotary files, also known as tungsten steel rolling mill, process a variety of metals (including hardened steel) and non-metallic metals (such as marble, jade, bone), carved in wood! The processing hardness can be up to HRC70. In a large part of the work, it can replace a small tail circle. No dust pollution. High production efficiency, processing efficiency higher than the small wheel stem nearly ten times. It is an important tool to improve production efficiency and achieve mechanization jobs of fitters. Specifications: Color: Silver Material: Tungsten Carbide Size: Overall Length 65mm, Tip Outer Diameter 10mm, Tip Blade Length 25mm Suitable for: Finishing all kinds of metal mold, all kinds of metal and non-metal carvings, processing parts, etc. Package Included: 5pcs cutting files.