The router bit set include 3 piece cleaning bottom router bits, 8mm Shank,16mm/18mm/20mm Blade Diameter Premium surface planing bits,C3 Micro-grain tungsten carbide cutters, solid hardened steel bodies with anti-kickback design Heat-resistant PTFE coating baking to prevent the accumulation of wood chips, resin and asphalt, Good wear resistance Surface planing CNC router bit are mostly used for cleaning bottom, hook and shear angles high hook and shear angles allow cutters to slice smoothly into stock producing clean, splinter free Suitable for solid wood, MDF, particle board, plywood, wooden door frames, wooden window frames, cabinets and boxes, etc ,For use on table mount and handheld router Features: Industrial grade micrograin carbide tip with sharp cutting edge, high hardness and long life. Solid hardened steel (45+hardness) body with anti-kickback design Surface Planing router bit can also be used for table slotting among other woodworking projects Double blade design,very sharp,can creat a smooth surface and enhance slotting and cleaning performance,reducing processing time Suitable for electric trimmer,bakelite milling,engraving and milling machine, CNC engraving machine, CNC machining centers and other machining tools Silver induction brazing provides strong strength and durability,regular rotation,good wear resistance and long service life Specification: Router type: cleaning bottom router bit Router bit body material: solid hardened steel Router bit cutter material: 45# Industrial grade micro grain carbide Shank diameter:8mm inch Blade diameter: 16mm/18mm/20mm Color: yellow Package Includes: 3 Piece 8mm Shank Cleaning Bottom Router Bit Note: Always wear goggles and use ear protection equipment when working Avoid cutting ferrous metal and non wood materials, such as steel, iron, sand, etc