It is a Milling Cutter/Engraving Bits/Carbide End Mill/Round Bottom Bit/Woodworking Router bit. Bit Type: Round nose bit. Material: High-speed steel body and shank, carbide-tipped edge. Can cut rounded grooves and slots perfectly for a variety of materials from wood panels, flakeboard, plywood, MDF and other wood composites sheet materials; can also be used in all handled and table mounted routers.