1/2 Shank Wood Planer Router Bit with 12x12mm Carbide Insert Slab.Wood Milling Cutter,Spoilboard Surfacing Router Bit Features: 1.This professional bottom cleaning router bit is not only perfect for wood slab flattening, resurface or plane the top surface of the spoilboard, but also for trimming and slotting/grooving. Great replacement bit tool for woodworking. 2.The surfacing router bit utilizes 4-sid solid carbide inserts. All 4 edges can be used, use a screwdriver(include) 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. 3.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. Specifications: Type:Insert-Style Spoilboard Cutter Material:Carbide Shank: 1/2''(12.7mm)shank Cut diameter: 3''(76mm) 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.