Turbo Diamonds are used in removing fillings and prepping a cavity site for a crown. The spiral design helps create a smooth surface as it quickly removes material. The spiral design also allows the debris to leave the site faster, giving it a 'self cleaning' property. Quick reduction, quick cooling Smooth surface Self-cleaning tooth material removal High efficiency Overall Length: 22MM Head Length: 8MM Head Diameter: 14 (1/10MM)