Drills, chippers, jackhammers -rotary cutter set Highlights generic brand rotary cutter set Description: Suitable for processing wood, aluminum, plastic, metal, stone, fiber of glass, porcelain and other material details of burs Hardened hardened carbide, high hardness, small and powerful, high grinding speed, easy to cut and safe storage Shank diameter: 3mm (about 1/8' '); Grinding Head Diameter: 3mm Tungsten Carbide Burr Rotary Cutter CNC Engraving Bit, Working with Most Small Rotary Tools for DIY Carving Fans 100% Brand New with Premium Quality, Durable and Practical Specification: Material: Tungsten Steel Shank diameter: 3mm (about 1/8''); Grinding head diameter: 3mm Total length: 39mm / 1.53inch Color: as shown in display pictures Package includes: 20pcs tungsten rotary burrs