General description These are a set of 100 abrasive grinding wheels designed for rotary tools, specifically compatible with Dremel tools. They feature a 3 mm shank and come in various head sizes of 4, 5, 6, 8, and 10 mm, making them versatile for different applications. 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 Suitable for grinding, polishing, sharpening, and deburring tasks. Designed for precision grinding of chainsaw blades and other tools.