It is a Carving Tools/Milling Cutters/Double Flutes Straight Router Bit/End Mill. Product Type: cleaning bottom router bit. Material: carbide-tipped, teflon coating, high-speed steel shank. Extra strong, last extra long, a very good wear life. Application: Mainly used for cutting and smoothing a variety of materials from wood, plywood, MDF and other wood composites, plastics, fiberglass, and solid surface etc.