10 pcs 3mm Shank Tungsten Steel Milling Cutter Burr Diamond Cut Rotary Dremel Tools Electric Grinding Rotary Tool Product Highlights: - Material: This carbide burr set/rotary bit set is made of premium tungsten carbide steel, which has a long working life. - Size Specifications: - Shank Diameter: 3 mm - Cutting Edge Diameter: 6 mm - Please check the size before you buy it. - Multi - Purpose: This rotary burr set includes everything you need for carving, engraving, polishing, and removing sharp edges. It is suitable for wood carving, stone carving, metal working, and die grinders. The kit includes a massive selection of shapes for all types of cuts. - Great Processing Quality: With this burr set, the surface of your target is smooth after carving or engraving, making it suitable for processing a variety of high-precision molds. These carbide burr rotary bits are generally used with handheld electric or pneumatic tool drives (can also be used in machine tools). The speed of the electric or pneumatic tools usually ranges from 6000 to 50000 revolutions per minute.