Dota Endo S-One. Features: - Better cutting force than soft file. - Better anti-cyclic fatigue than hard file. - Better debris discharge by progressive pitch. - One file rotation system, saving time. Specifications: - Speed: 350 RPM. - Torque: 2.5 N.cm. - Size: #17. - Taper: 4%. - Length: 25 mm. - Color: Blue.