Utoolmart Tungsten Carbide Rotary Files with 1/8-inch ShankProduct Features* Tungsten Carbide burrs can be processed cast iron, cast steel, carbon steel, alloy steel, stainless steel, copper, aluminum and other metals, and marble, jade, bone and other non-metallic. Processing hardness up to HRC58-60.* It can replace the petiole small wheel without dust pollution, and process out a various of high-precision mold cavity. High production efficiency, the processing efficiency is several times higher than file, nearly 10 times higher than small wheel stalk.* Suitable for woodworkers and enthusiasts who clean up welds or works with metal frequently. Easy to grasp and use. Unique tooth angle prevents chipping.* Mainly used for grinding channel impeller, cleaning tubes, finishing mechanical internal surface, enlarging holes, processing and engraving metal non-metal materials.* Can be used to finely process metal die cavity and mechanical chamfering, rounding, grooves, and clean up burrs of castings, flashings of forgings, welds of weldments.Tips* Mainly used on pneumatic or electric tools, the requirement rotating speed is: 4000-50000 rpm.* Clamped down tightly and be sure the working direction is always counterclockwise during use.* Prevent chips flying apart when working and better wear goggles. Keep your eyes and belongings away from the working bits.Technical Parameters* Shank diameter: 3mm / 1/8-inch* Cutting edge diameter: 3mm / 1/8-inch* Bit Type: Spherical* Material: Tungsten Steel Alloy* Color: SliverPackage Content* 2 x Tungsten Carbide Rotary Files