Product Description Material: alloy steel, tungsten Quantity: 6 pcs Package content: 6 * transparent knife 1.6Pcs Cleaning Bottom router bit with 8mm Shank 2.Solid Hardened Steel Bodies with Anti-Kickback Design, Build-up & Heat Resistant Teflon Coating Carbide Burs, Solid Hardened Steel Body with Anti-Kickback Design 3.C3 micro-grain tungsten carbide cutters, double-edged cutting design, excellent concentricity 4.Ideal woodworking tool for cutting all composition materials, plywoods, hardwoods, and softwoods Industrial grade bottom cleaning cutters for cutting and smoothing. 5.For use on CNC routers and other automatic routers, as well as portable and table-mounted routers. .Used for a variety of materials like wood, plywood, MDF and other wood composites, plastics, fiberglass and solid surfaces, etc.