[Carbide Die Grinder Bits]: These carbide swivel burr sets with 1/8 inch (about 0.3 cm) shank are made of tungsten carbide. Overall length: 45-50mm, cutting diameter 1/4inch, shank length 35mm, shank diameter 1/8inch.[Dual Cut Design]: The grooved line cross of these carbide rotary burr heads makes it more suitable for materials with relatively low thickness, such as wood, plastic and aluminum.[COMPATIBILITY]: 1/8 inch (about 0.3 cm) shank fits for and most small rotary tools, with three jaw collets for accurate centering. Perfect for DIY woodworking, carving, carving and polishing.[LONG LIFE LIFE]:Packed in plastic storage box for safe storage and protection. These solid rotating burrs last 10 times longer than high-speed steel and 200 times longer than grinding wheels.colour: as shownMaterial: MetalPackage Contents:20 x grinding headOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.