Packaged included: 1PCS Tungsten Burrs Drill Bitwith a plastic box Features: - For DIY enthusiast or hobby and craft fan, give your rotary tool even more functionality. - Easy and simple to use, safe and reliable. - High production efficiency, processing quality, high-quality finish and long service life. - The speed is generally 6000-40000 rev / min in pneumatic or electric tools. - Processing hardness up to HRA 85. - Suitable for deburring and polishing steel, aluminum, copper etc. metals; and tiles, marble, jade, etc. non-metallic. - Widely used in home and factory small work. Specifications: Material: Tungsten Steel Solid Carbide Color: Silver Compatibility: smaller rotary tools Model Number:1,2,3,4,5,6,7,8,9,10 Shaft diameter: 3mm /0.19" Drill Bit size: 6mm/0.24" Quantity: 1pcs Note: Cutting direction should beright to left uniform movement,do not to force too much the pressure is generally not more than 4 kg.