General description These carbide rotary burrs are made of high-quality tungsten carbide steel, ensuring they are sharp, sturdy, and durable. The set includes 10 pieces with a double-cut design, allowing for efficient grinding and carving on various materials. Technical specifications Total length: 45-50mm Cutting diameter: 1/4 inch Shank length: 35mm Shank diameter: 1/8 inch Compatibility and accessories Compatible with most rotary tools and grinders Can replace small abrasive wheels with handles Usage Ideal for wood, iron, carbon steel, alloy steel, stainless steel, copper, aluminum, marble, jade, and bone Great for DIY projects, crafts, hobbies, home repair, jewelry making, stone working, and model making Other information Packed in a plastic case for safe storage and protection Life expectancy: 10 times higher than high-speed steel and 200 times higher than abrasive wheels Recommended rotary tool speed: 6,000 to 50,000 rpm