General description 100 pieces of abrasive polishing mounted grinding wheels designed for rotary tools such as Dremel. This set includes various head sizes and shapes to meet different grinding needs. Technical specifications Quantity: 100 pieces Shank diameter: 3 mm Head sizes: 4 mm, 5 mm, 6 mm, 8 mm, 10 mm Material: High-quality chrome corundum Maximum speed: 30,000 RPM Usage Precision grinding for quick and easy sharpening of chain saw blades and other tools Suitable for grinding, polishing, sharpening, and deburring tasks