General description Made of high-quality high-speed steel, these 20 Pack Dremel Tungsten Carbide Cutting Burrs Drill Bits are designed for long life and exceptionally accurate cuts, saving you energy and stress. They are a valuable addition to any woodworker's rotary tool and are suitable for most rotary tools, including DREMEL, Craftsman, Chicago, and more. This set includes the most commonly used types of cutters, ideal for detailed work on various materials. Technical specifications Material: High Speed Steel (HSS) Shank: 3.17mm Package Includes: 1 Set of 10 Carbide Engraving Bits, 1 Set of 10 Wood Router Bits Usage Suitable for engraving on a wide range of materials, including wood, ABS, acrylic, PVC, and plastic. Ideal for detailed work such as building and sanding dollhouse furniture, model trains, or model buildings and airplanes. User-friendly design with an easy insertion process for longer life and ease of use.