General description This 8-piece Double Cut Tungsten Burr Set features premium carbide burrs designed for electric drill rotary tools. Each burr is crafted from raw pure tungsten, ensuring exceptional durability and performance. The set includes the most popular shapes, all housed in a convenient matching case. Technical specifications Material: Tungsten carbide Shank size: 6mm (1/4 inch) Hardness: HRC70 Durability: 10 times longer than HSS cutters, 200 times longer than small wheels Usage Metalworking Tool making Model making Wood carving Jewelry making Welding Chamfering Deburring Grinding Lock opening Carving