【Precision Size】8mm Shank CNC spoilboard surfacing router bit, 51mm cutting diameter, 12.7mm cutting height. 【Premium Material】Made of microcrystalline carbide inserts and solid hardened steel body for superior wear resistance and sharp edges, precise cutting reduces debris and burrs, and has an anti-backlash design. High-precision grinding technology, stable and efficient. 【Multi-Function】4 blades allow you to quickly and cleanly cut your project material, clears the surface of your spoilboard or Creates a base surface that is perpendicular to the router motor, also suitable for trimming and slotting/grooving . Can use to flatten live edge boards too large to go through planer, great for projects of any level of complexity. 【Widely Applications】These router bits suitable for cutting solid wood, particle board, plywood, MDF and different wood composites. (Avoid cutting black metal and non-wood materials such as steel, iron and sand). 【Applicable Machines】Suitable for CNC and other