It is a CNC Tools/Milling Tools/Milling Cutter/End mill/CNC Router Bits/Round Over Edging Router Bit. Product Type: top ball bearing beading 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 a variety of materials from wood, plywood, MDF and other wood composites, plastics, and solid surface etc.