It is a Carbide Tools/Milling Cutter/Arc Router Bit/CNC Tools/Anti-kickback Design Round Over Edging Router Bit. Product Type: top ball bearing beading router bit. Material: carbide-tipped, teflon coating, high-speed steel shank. Application: Mainly used for cutting a variety of materials from wood, plywood, MDF and other wood composites, plastics, and solid surface etc.