It is a CNC Bit/End Mill/Drill Bits/Engraving Bits/CNC Cutter/CNC Router Bits. Product Type: 2 flutes straight grooves cone metal engraving bit. Material: solid carbide. Cutting Angle: 90 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.