10pcs 3mm Shank Double Cut Tungsten carbide Rotary Burr Sets For Dremel Rotary Tools Rotary File Features: 1. Made by Tungsten Carbide , ensure fast cutting and polishing. 2. Fine workmanship is beneficial for production efficiency,and long service life. 3. It is specially designed to bring single and double sides , easy to use, safe and reliable. 4. Application -- Can be processed cast iron, cast steel, carbon steel, alloy steel, stainless steel, copper, aluminum and other metals, and marble, jade, bone and other non-metallic. Specification: Item Name: Rotary Burr Type: single line Material: Tungsten Carbide Length:38mm (close to 1.5") Shank Diameter: 3mm (close to 1/8")