A grinding wheel is a tool used for grinding, sharpening, or polishing materials like metal, stone, or concrete. It is made of an abrasive material, such as aluminum oxide or diamond, that is bonded to a wheel-shaped disc. The wheel rotates at high speeds and is pressed against the material, removing small amounts to shape or smooth it. Grinding wheels come in different sizes and types, depending on the material and task. They are commonly used in metalworking, construction, and sharpening tools or blades.

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