Material: Tungsten Carbide, Shank diameter: 3 mm(1/8 inch), Cutting edge diameter: 6 mm(1/4 inch), Total length: 50 mm(2 inch).Please check the size before you buy it. | Double cut head. Suitable for deburring and polishing cast iron, cast steel, carbon steel, alloy steel, stainless steel and other materials. | Excellent for fine detail work, cutting, engraving, carving, touch-up and finishing. | Processing all kinds of metal(including all sorts of hardened steel) and non-metal (such as marble, jade, bone), and the machining hardness can reach to HRC70. | Generally use with handheld electric or pneumatic tool drive (can also be used in machine tool). The speed of the electric or pneumatic tools usually is 6000-50000 revolutions per minute.