The Norton India AO square file is suitable for diverse applications, such as dimensioning keyways to ensure proper fit, stoning router bit faces, refining reamer teeth edges and lapping/honing to achieve close tolerances for precision instruments. It is also ideal for die work and delicate tool maintenance. The file features a smooth-cutting aluminum oxide abrasive, enabling the rapid production of a strong, sharp and durable edge with a consistent finish, while preserving the file's shape. It is available in coarse, medium and fine grits, catering to the restoration of edges, the production of standard edges and the attainment of exceptionally sharp cutting edges. Applications encompass dimensioning keyways to ensure proper fit, refining the surfaces of router bits, sharpening the edges of reamer teeth and performing lapping or honing to achieve close tolerances for producing the finest edges on precision instruments, die work and delicate tools 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