- Designed to be used in sequence to remove filling materials. - Three easily identified files are designed for the different needs of unfilling the canal before reshaping. - The D1 file has a working tip that facilitates initial penetration. - Each handle is no more than 11 mm for better visibility. - Sold in a 6 pack of individual or assorted sizes. - Length:22mm/18mm/16mm. - Size:D1,D2,D3. - For Densply Protaper Reteatment file,made of special niti alooy with good resistance and elasticity. - Use for removing gutta percha and fillings in root canal. - Recommended speed is 150-300r/min,torque 2.5N.cm. **For further product information, please contact Chat Support**