Mani Flexile Files which adopts Mani Hard Fiber Stainless Steel which has achieved super flexibility and high fracture resistance. Square cross section is used in the files to avoid any breakage. This has adopted square shape for sizes upto 40, superflexibility retained with triangular cross section for a curved root canal. The value of moment of inertia is small for the triangular cross section which improves the flexibility and cutting efficiency for its stand out edges. These are high quality 25mm Flex files.