E-Flex is a highly flexible endodontics rotary instrument specifically designed to negotiate curved canals shows excellent resistance against torsional fracture and cyclic fatigue failure. E-Flex in two colors, gold and blue, comes in different tapering systems, 0.04, 0.06 and progressive for varying canal anatomies and a great all-round file system. E-Flex provides excellent cutting efficiency and high flexibility, makes it a good choice to reduce ledge formation, apical extrusion and canal transportation. Using different techniques of manufacturing and having variable pitch, E-Flex prevents locking and brings safe treatments.