- Adapted S cross section with specific side-cutting to ensure effective debris removal and strongly reduce screw-in effect. - Innovative polishing and nano coating technology strengthen cyclic fatigue resistance of the file and lower the risk of file breakage. - New heat treatment to increase flexibility without compromising cutting efficiency. 1 Kit : - 17/12 25mm. - 15/04 25mm. - 20/05 25mm. - 25/04 25mm. - 30/04 25mm. - 25/06 25mm. **For further product information, please contact Chat Support**