For an optimal combination of cutting efficiency and surface finish, select the Norton India AO diamond-shaped files. These files are particularly suitable for cleaning acute angles in dies and molds, as well as for stoning geometric chasers and sewing machine feeds. The aluminum oxide abrasive ensures durable, long-lasting edges and consistent finishes without compromising the file's shape. Opt for coarse grit to rapidly restore edges, medium grit for general sharpening requirements and fine grit for achieving the sharpest edges. Ideal for precision cleaning of acute angles in dies and molds, as well as for stoning geometric chasers and optimizing sewing machine feed mechanisms Coarse grit rapidly restores worn edges, medium grit achieves the standard edge required for most tools and fine grit creates an even sharper edge Engineered to maintain their form while providing a consistent finish The aluminum oxide abrasive from India delivers a smooth cutting performance, producing a robust, sharp and durable edge It is the preferred choice for achieving an optimal balance between cutting speed and surface finish