1. Industrial Grade, industrial super-strength steel body, industrial insert knives. 2. These industrial router bits feature solid carbide inserts knives with four cutting edges that allow users to rotate when one side becomes dull providing the quality finish available on woodworking tools. Exquisite woodworking cutter, precise, smooth, no burr edges planer router bit. 3. This routing bit great for cutting large areas and planing. For fast removal of material over a large area leaving an improved finish at the bottom of the cut. Great for hand-making and other woodworking job . 4. This planer router bit is perfect for wood slabs flattening, resurface or plane the top of the spoilboard. Used on soft and hard woods, particle board, MDF, plywood compact panel, laminate, acrylic and etc. 5. Use on CNC and other automatic routers as well as hand-held and table-mounted portable routers.Such as woodworking engraving machine, trimming machine, etc. Milling Cutter CNC Spoilboard Surfacing Router Bit 8/12mm Shank Insert Carbide Slab Flattening Router Bit Wood Planer Bit 8x38.1x60Lx4T & 12x45x60Lx4T Flute:4 Shank:8mm shank 12mm shank Cut diameter: 1-1/2inch(38.1mm) 1-3/4inch(45mm) Carbide Inserts: 12x12x2.2mm. Application:Suitable for woods, mdf, laminate, particle board, plywood compact panel, acrylic and etc. Avoid cutting metal and non-wood materials; Used on soft and hard woods, particle board, MDF, plywood compact panel, laminate, acrylic and etc. This professional bottom cleaning router bit is not only perfect for wood slab flattening, resurface or plane the top of the spoilboard, but also for trimming and slotting/grooving. (without blade) Color: As Shown Material: Cemented Carbide Package Contents: 1 x 8mm k 4-flute discarded woodworking cutter Only the above package content, other products are not inc