It is a Carbide Drill Bits/CNC Cutter/End Mill/CNC Tools/V Engraving Bits. Product Type: 2 flutes straight grooves cone metal engraving bit. Material: solid carbide. Cutting Angle: 45 degree. mainly used for the engraving and marking of stainless steel, aluminum, brass, medium density fiberboard, wood panels, plastic and many other soft gummy materials.