Feature: 1. SAFELY STORED AND PROTECTED: The whole piece is made of heat treated solid tungsten carbide with long service life. Equipped with a beautifully packaged plastic case, which can be safely stored and protected 2. USE WITH HANDHELD ELECTRIC OR PNEUMATIC TOOLS: Generally used with handheld electric or pneumatic tools, and can also be used for machine tools 3. 1/8IN HANDLE: 20 pieces solid carbide rotating burr kit have 1/8in handle(3mm), suitable for Dremel and most small rotating tools 4. SINGLE AND DOUBLE PATTERN: The package contain tungsten carbide burr with single and double pattern design to meet a variety of work needs 5. SMOOTH CHIP REMOVAL: Rotary file drill bit set come with high working efficiency and smooth chip removal, very practical Specification: Item Type: Tungsten Carbide Burr Set Total Length: Approx. 38mm / 1.5in Material: Tungsten steel File Pattern: Single, double pattern Cutting Diameter: 1/8in(3mm) Shank Diameter: 1/8in(3mm). Package List: 20 x Tungsten Carbide Burr