TUNGSTEN CARBIDE STEEL ROTARY BURR SET: Made from premium quality tungsten carbide steel, these rotary burrs are sharp, strong, and durable. Overall length: 45-50mm, 1/4" cutting diameter, 35mm shank length, 1/8" shank diameter, compatible with most rotary tools and die grinders. CUT: The head features crossed groove lines for efficient material removal. Suitable for use on wood, iron, carbon steel, alloy steel, stainless steel, copper, aluminum, and other metals, as well as marble, jade, bone, and similar materials. Ensures fast cutting, efficient chip removal, and smooth grinding and carving performance. HIGH WORKING EFFICIENCY: Offers significantly higher processing efficiency compared to manual files and small handheld grinding wheels. This rotary cutter set can generally replace small grinding wheels with handles. Provides easy cutting, safe operation, and long-lasting durability. LONG LIFE: Supplied in a protective plastic case for safe storage. These heavy-duty carbide burrs last up to 10 times longer than high-speed steel tools and up to 200 times longer than standard grinding wheels. Designed for use at typical rotary speeds of 6,000 to 50,000 RPM, reducing wear and extending tool life. WIDE APPLICATION: 10-piece solid carbide double-edge rotary burr set compatible with most small rotary tools. Ideal for DIY projects, crafts, hobbies, home repairs, jewelry making, lapidary work, modeling, and more.