Made of high quality NiTi alloy with flexible performance after special heat treatment process. Improved the fracture resistance. Forward cutting angle with excellent cutting efficiency, easy to discharge debris. The round tip can prevent steps or piercing through by the side. Adaptive thread makes the files efficient ,flexible and high strength. Pack contains: - R, 17 mm. - 016, 25 mm. - S1, 25 mm. - S2, 25 mm. - S3, 25 mm. - S4, 25 mm. **For further product information, please contact Chat Support**