General description This set includes 8 of the most popular shapes of double cut tungsten rotary burrs, designed for use with electric drills and rotary tools. Made from 100% raw virgin tungsten carbide, these burrs offer exceptional durability and performance, making them an excellent choice for precise metal removal and shaping tasks. Technical specifications Material: Heat-treated tungsten carbide Shank Diameter: 6mm (1/4 inch) Hardness: Can reach HRC70 Durability: 10 times that of HSS cutters, 200 times that of small wheels Recommended Rotating Speed for Aluminum: 6000-50000 rpm Compatibility and accessories Fits most rotary tools with a 1/4 inch chuck Includes 8 different shapes of burr heads Usage Suitable for processing various metals and soft materials like wood and aluminum Applications include metal working, tool making, model engineering, wood carving, jewelry making, welding, chamfering, molding, deburring, grinding, and porting cylinder heads Recommended to wear safety