Features: - One file for incredible efficiency. - Superior Flat-sided design: more room for bypass and debris removal, significantly decrease screwing effect. - Taper Indicator. - ISO Standard color. - Heat-treated Control Memory NI-TI Wire: Enhance flexibility and resistance to cyclic fatigue for safe treatment. Pack contains: - 1 x #17-08. - 1 x #20-04. - 3 x #25-04.