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. - Kit contains : - 1 x #17, Taper 8%, Yellow. - 1 x #20, Taper 4%, Yellow. - 3 x #25, Taper 4% , Red.