Improve the surface hardness of the drill bit, improve the machining accuracy, improve the surface quality of the drill bit, reduce the coefficient of friction with the workpiece during processing, improve the temperature resistance and wear resistance of titanium, and thus increase the processing speed of high-speed machining. Carving Drill Tools: With the help of wood carving tools, you can create your own wooden crafts and turn masterpieces into reality. Practical Tools: You can easily complete any type of wood carving project and use Easy to Use: Just connect it to an electric drill and use it! Practical and easy to use, this drill set allows you to carve wood effortlessly, which is different from traditional carving, which can damage and bruise your hands. High-quality materials: These burrs are designed to remove wood faster. Made of sharp high-speed steel, you can cut wood easily and quickly while maintaining a smooth surface. Note: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 2. Please allow slight size difference due to manual measurement. And thank you. 3. Other accessory demonstrations in the picture are not included. Size: 3mm/4mm/5mm/6mm/8mm Color: Silver Quantity: 5pcs