The ProTaper Universal NiTi rotary instruments represent a revolutionary progression in root canal preparation procedures. The ProTaper system was designed to provide the fewest number of instruments that would afford superior flexibility, unmatched efficiency and improved safety. The instruments were extensively tested for more than 5 years before coming to market in April 2001. The ProTaper concept is logical, the instrument sequence is simple to understand, and the technique is easy to learn. The files may be used in any portion of a canal that has been instrumented to at least a size 15 hand file and has a confirmed, smooth and reproducible glide path. The set contains three (3) "Shaping" and five (5) "Finishing" instruments.