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 Silversmith's Stones are specially shaped for use by silversmiths and mechanics. They are ideal for close tolerance lapping and cleaning tools and dies. India Silversmith's files are constructed to maintain their shape while producing keen edges and uniform finishes. Worn edges can be restored with the coarse grit files. Quality edges can be achieved with the medium grit. The fine grit delivers sharper edges. Available in a wide variety of sizes. 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.