Tungusten Carpide Burs Set - Contra- Angle & High Speed HandpieceFrank Dental C1S Rond Tungusten Carbide Bur Set Tungsten carbide bur suitable for use on hard metal, steel, glass, ceramic, etc. Frank dental rond mills are ideal for preparing single surface cavities. Middle teeth can be used for interproximal spaces in anterior teeth (Class III). Additional applications include gaining root canal access both anteriorly and posteriorly. Burs made of fine grained tungsten carbide retain their shape for a long time.