- Super economical diamond burs. - Head Diameter (1/10 mm): 14. - Cutting Length (mm): 8. - Total Length(mm): 22. - Shank Type: 314-FG Standard. - Shank Diameter(mm): 1.6. - Head Shape: Needle. - Grit: 514-Fine. - Color: Red. - ISO 165/014. - MAX. speed 300,000 rpm. **For further product information, please contact Chat Support**