ITEM NAME:2 Pieces 2 Types Carbide Straight Dado Router Bit Wood Anti-kickback Design Description: Router CNC Engraving Wood Working Bottom Cleaning Bit - 8mm/ 0.315in Shank - 5mm/ 6mm Cutting Diameter. Industrial grade micro grain car.Size(Approx.). Mainly used for cutting and smoothing a variety of materials from wood, plywood, MDF and other wood composites etc. Build-up & heat resistant polytef coating, anti-kickback design. Total Length: Approx.