ITEM NAME:2Pcs 8mm Shank Straight Dado Router Bit Carbide Wood Milling Cutter Woodworking Description: Router CNC Engraving Wood Working Bottom Cleaning Bit - 8mm/ 0.315in Shank - 6mm Cutting Diameter. Industrial grade micro grain car.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: 49mm/ 1.93in.