Discover our 20 - piece carbide burr bits set. With a 3.175mm cylindrical shank compatible with 1/8 in. shank bits, these double - cut tungsten carbide burr bits are more aggressive than diamond and stone bits. They are suitable for use with angle or straight air or electric die grinders or drills. Ideal for 3 - jaw chuck drills and high - speed rotary tools, they can be used on hard metal, steel, aluminum, stone, wood, and plastic. They are perfect for tight spaces and detailed work. For large - scale material removal, pair them with larger shank burrs and a 500W+ rotary tool. This set offers a versatile solution for cutting, grinding, carving, and engraving, bringing convenience to your DIY projects and professional work.