Grit wheels are abrasive tools used in various industries for grinding, polishing, and shaping materials. They consist of a circular disc made from a composite of abrasive particles, which can include materials like aluminum oxide or silicon carbide. Grit wheels come in different sizes and grit levels, allowing users to select the appropriate wheel for their specific task. These wheels are commonly used on machines such as bench grinders and angle grinders. The grit level indicates the coarseness of the wheel, with lower numbers representing rougher surfaces for heavy material removal, while higher numbers are suited for finer finishing work.