Different types of hand file have been introduced from time to time with varied structure and cutting action. The Unifile and Helifile were modifications of the Hedstroem design. The Mani Flare file is made from a triangular blank, and features a greater taper than conventional 2% files. It is essential when considering the use of new file designs that the operator understands the basic principles of canal preparation, and compares and contrasts the properties with the file manipulation technique currently being used.