Amariver 10Pcs Head Tungsten Carbide Rotary Burrs Set, Shank Rotary Burr Die Grinder 1/8-Inch Shank Cutter for Rotary Drill Die Grinder Carving Bit Amariver 10Pcs Tungsten Carbide Rotary Burrs Set: Made of heat-treated durable double cut carbide, with 1/8-Inch (3mm) shank cuts through metal (iron, steel) and other materials (stone, jade, bone) with very little effort; fits dremels and other grinders Assorted Shapes and Sizes: All burrs with a 1/8" (3mm) shank, Large burrs is 1/4" (6mm). High quality of Processing, smooth finish, compatible with most die grinders or rotary tools Multi-functional Tungsten Carbide Burrs: Highly recommended for jewelers, lapidary use, hobbies, crafts, craft modeling, home repair and so much more Package includes 10 pack Tungsten Carbide Rotary Burrs and a hard plastic case for storage and convenient portability Wide Appliaction: Can be used for metal finishing working in mold cavity and pattern making, die sinking, surface cleaning and maintenance