- Sani H-Files 31mm 45-80. - Pulling up and down movement to efficiently expand the root canal, made of special medical stainless steel or nickel-titanium alloy, precise cutting angle, special grinding technology to ensure strong cutting force, unique processing technology, reduce the possibility of perforation and offset; Will not cause root canal deformation, not easy to break, and long service life. - It is made of special medical stainless steel or nickel titanium alloy Special processing craft. - Ensures its outstanding cutting efficiency, making it less possible to perforate or cause transportation. - Excellent fracture resistance renders it long life-span. - The technique is to pull the file up and down when enlarging the root canal. - Size #45-80. - Length: 31mm. - Strip: 6 Pcs. **For further product information, please contact Chat Support**