5 x 1/4" Tungsten Carbide Burr 6mm Rotary Cutter files Set CNC Engraving Feature: Carbide rotary files, also known as tungsten steel rolling mill, process a variety of metals (including hardened steel) and non-metallic (such as marble, jade, bone), wood carving choice! Processing hardness can be up to HRC70. In a great part of working, it can replace Petiole small wheel. No dust pollution.High production efficiency,the processing efficiency higher than small wheel stalk nearly ten times . It is an important tool to improve production efficiency and achieve fitter mechanization jobs. Color:Sliver Material:Tungsten carbide Size::Total length 65mm, outer diameter of the tip 10mm,tip blade length 25mm Weight:148g Fit for:Finishing all kinds of metal mold,all kinds of metal and nonmetal carving,parts Processing,etc. Package included:5pcs cutter files.