• Set of 10 rotary burrs made of high-quality carbide, offering great robustness and durability • Allow cutting wood, metals such as iron, carbon steel, alloy steel, stainless steel, copper, aluminum, and non-metallic materials such as marble, jade, and bone • Double cutting head design provides higher working speed, better polishing effect, and smooth surfaces after cutting • Ideal for DIY tasks, carpentry, carving, engraving, polishing, beveling, grooving, reaming, and hollowing • Universal 1/8" (3 mm) shank and 1/4" (6 mm) cutting diameter, compatible with most rotary tools • Includes plastic storage case • Significantly longer lifespan than HSS burrs and small grinding wheels • Easy to handle, safe, and reliable