Features: These milling cutters are made from superfine tungsten carbide for high hardness, wear resistance and long service life. Specially designed for CNC engraving MDF material, can also engrave chipboard density board, PVC, acrylic and resin, etc. Can be used on woodworking engraving machine, CNC, CNC routers, and many other engraving machines. These milling cutters can cut, engrave, remove chips fluently and create a smooth cutting surface. They also have high work efficiency for rough machining non-ferrous metal. Specifications: Material: Tungsten carbide Shank Shank Diameter: 3.175mm Cutting Edge Diameter: 1mm Cutting Edge Length: 4mm Total Length: 38mm