Sharpening Stone

is a tool used for sharpening the edges of knives and other cutting tools. It typically consists of a flat, rectangular block of abrasive material, such as natural or synthetic stone.

Sharpening stones come in various grit sizes, which determine the coarseness or fineness of the sharpening surface. Lower grit numbers (e.g., 200 to 600) are considered coarse and are used for repairing damaged or dull edges, while higher grit numbers (e.g., 1000 to 8000) are finer and used for refining and polishing the edge to achieve a razor-sharp finish.