Impart the correct edge in the least amount of time with the Norton India AO Triangular Tapered File. Used for a variety of deburring, chamfering and radiusing applications, these files are designed to retain their shape while achieving a uniform finish. The aluminum oxide abrasive makes this file a good choice for when you need to produce a sharp, long-lasting edge fast. Choose the medium grit file for most of your average tool edge sharpening needs and the fine grit file when a sharper edge is required.