Pronounced tapers. These files make root canal treatment quicker and simpler. The 4% and 6% variants in taper are used to prepare the apical and coronal thirds respectively. The files progressively remove any constraints present in the root canal system and flare the canal. The files have a varying helical pitch and length of the cutting portion. This design provides the files with an excellent combination of efficiency and flexibility. These rotary files have an innovative pitch design that avoids screwing effects. The new pitch varies according to the taper of the file.