India Abrasive File · Aluminum Oxide · Produces Long Lasting Edges Falcon Tool India Abrasive Files are made of aluminum oxide abrasive which is the preferred abrasive for producing exceptionally sharp, long lasting edges and for high quality steel work. They are brown in color and filled with oil during the manufacturing process. India Abrasive Files are available in coarse, medium and fine grits. Coarse (C) 100 Grit Medium (M) 240 Grit Fine (F) 320 Grit India Points allow you to quickly clean tight corners and recesses without removing too much material. They are ideal for applications that require close tolerances and accuracy. The smooth cutting aluminum oxide abrasive is perfect for achieving long-lasting edges and consistent finishes. Available in a 5/16" x 3" size. Although oil-filled, we recommend using an oil such as our Stoning Oil or Polishing Lubricant and Diamond Thinner for best results as the use of oil increases the sharpening action and minimizes the clogging of the stones' surface.