1. Tungsten carbide burs keep on excellent quality 2. More than 100 specifications is developed to satisfy your fully professional requirement on grinding; 3. You can choose 3 different surface color (self-colored & not plated; Silver & nickel plated; Gold & Ti plated); 4. Keep the surface clean (Oil on surface have been got rid of by Ultrasonic); 5. Beside different shapes, you can choose sizes, grain & length)