Cnc Spoilboard Surfacing Router Bit By Binstak, 1/2" Shank, 3", Wood Planer Bit. 4-WING INSERT CNC ROUTER BIT: Shank: 1/2"; Cut Diameter: 3"; Carbide Inserts: 12*12mm. 3 inch larger cut diameter and 4-wing design, make more efficient and resulting in a more balanced tool while running. INDUSTRIAL GRADE CNC WOOD ROUTER BIT: Super-strength steel body with anti kickback design, 4 cutting blades. COST-EFFECTIVE INSERT BIT: The spoilboard surfacing router bit utilizes 4-sided solid carbide inserts. All 4 edges of carbide inserts can be used, use a screwdriver to make other blade edge outside. Replace the carbide inserts when needed, instead of replacing the whole bit. Cost effective solution compared to brazed router bits and solid carbide spiral bits. This planer router bit is perfect for wood slabs flattening, resurface or plane the top surface of the spoil board. Used on soft and hard woods, particle board, MDF, plywood compact panel, laminate, acrylic and etc. 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.