CHOOHC 4pcs Tungsten Carbide Rotary File Solid Carbide Rotary Burr Set Drill Grinding Cutter Tools Bits Set with 6 mm Shank and 6 mm Head Size for DIY Wood-working Carving, Metal Polishing, Engraving, Drilling Features of Rotary Burr Bit: Used with handheld electric or pneumatic tool drive,for Die Grinder, Dremmel Tool or Rotary Drill. Tungsten carbide material that hardness can reach to HRC70 ,sharp and sturdy,processing all kinds of metal and non-metal. Tungsten carbide burrs are used for cutting, grinding, deburring, removal of sharp edges, and shaping the workpiece. Widely used on a variety of materials including aluminum, metals, steel, cast iron, fiberglass, wood, acrylics, and plastics. Assorted shapes include: Tree shaped radius end, Cylindrical radius end, Ball shape, Taper shape with radius end. Ideal for metal working in mold and pattern making, die sinking, surface cleaning and maintenance. Specifications of Rotary Burr Bit Material: Tungsten Carbide Shank Diameter: 6mm Cutting Head Diameter: 6mm Total Length: 150-160mm(6 inch) What's in the Package: 4pcs/set Tungsten Carbide Burrs Tool