Dremel 85422 - 20mm Wheel Grinding Stone.

• Silicon Carbide Grinding Stones are designed to grind and etch stone, glass, ceramics, porcelain and non-ferrous metals.
• Specially designed for working with conic and flat surfaces.
• Ideal for sharpening, deburring and general purpose grinding on harder materials including stone, glass, ceramic, porcelain, gemstones and non-ferrous metals.
• 3.2mm shank.
• For use with Dremel Rotary Tools.