It is a Carbide Milling Cutter/End mill/Flat bottom Engraving Bits/Drill Bit. Product Type: Flat nose engraving tool bit. Shape: V-Shape. Material: Tungsten carbide. Cutting Angle: 30 degree. Used to engrave and mark a wide variety of materials: Aluminum, Steels, Plastic, Brass, Stainless, Tool Steels, Anodized and other Plated Parts, Wood, Brozne, Plastics, PVC, PCB, MDF, Acrylic and many others.