(4 files/package). FEATURES Superior - Cutting Efficiency � Sharp and strong blade construction to help file move deep into the canal � Triangular cross section reduces contact with the canal wall � Designed to instrument calcified or severely curved canals. - High Flexibility � Progressive taper design increases flexibility and efficiency � High corrosion resistance with coated surface � Premium nickel titanium material. - Highly Integrable � Designed to work interchangeably with your current technique and system