A Combination Sharpening Stone is a dual-grit sharpening tool used to hone and refine the edges of knives, chisels, and other cutting tools. Made from aluminum oxide, it features a coarse side for repairing dull or damaged edges and a finer side for polishing and sharpening. This versatile stone is ideal for maintaining precision and prolonging the lifespan of blades. It can be used with water or oil, depending on the type, to enhance the sharpening process.