Feature:1. Vibration Free: Possess 2 flute, sturdy and vibration free. The drill bit is well balanced and will not pull to one side, very stable2. Hardened and Sharpened Tip: Hard tungsten steel tip can increase speed and service life, processed after hardened and sharpened, more durable3. Anti Backlash Blade: Hard tungsten steel blade adopt anti backlash design, which will not burn the notch4. Stable Cutting and Accurate Engraving: The blade has high strength and hardness, sharpness, stable cutting, and high engraving accuracy5. For Cutting Beading Grooving: Cove box router bit can be used for cutting, beading, grooving and general decoration, very practicalSpecification:Item Type: Cove Box Router BitCommodity Material: Tungsten steelCutting Diameter: Approx. 18mm / 0.7in12mm / 0.5in10mm / 0.4in8mm / 0.3in6mm / 0.2inTool Handle: Approx. 6mm / 0.2inUses: Round nose router for cutting, beading, grooving and general decoration.Package List:5 x Cove Box Router BitNote:Do not cut metal and non wood materials, such as steel, iron, sand, etc.