Feature:1. Made of highquality tungsten steel carbide, strong and durable. Used for wood, iron, carbon steel, alloy steel, stainless steel, copper, aluminum and other metals, marble, stone, bones, etc2. High speed plus double cutting equals smoothness, used as mold grinder drill or metal engraving drill. Save a lot of time3. All burr 1/8" handles are compatible with for Dremel or most rotating tools, and are precisely determined4. 10 different shapes, suitable for woodworking, engraving, engraving and polishing various fine works5. The tungsten carbide burr engraving bit is easy to use and reliable. The durability is ten times higher than that of highspeed steel tools and more than 200 times higher than that of small grinding wheelsSpecification:Item Type: Rotary FileMaterial: Tungsten SteelPurpose: Grinding HeadType: Single Pattern/Double Pattern (Optional)Tool Handle Diameter: Approx. 3mm / 0.1inHead Diameter: Approx. 6mm / 0.2in.Package List:1 x Rotary FileNote:Please allow 0‑2 cm error due to manual measurement. Thanks for your understanding