Because of the 5/100 taper ratio, the FLARE Files give more precise and correct forming, without over instrumentation. An ideal shaped canal taper will be automatically obtained when Flare Files reach the apex. Flare Files can be used as a guage for an ideal wall taper after enlargement. Using the Flare Files the process are extremely shortened as compared to the conventional step-back preparation. Triangular Cross Section, Very effective for curved root canals, Triangular cross-section with 5/100 taper