Kutzall Extreme Taper Rotary Burr, 1⁄8" Shaft, Very Coarse - Wood Carving Bit for Dremel, Foredom, DeWalt, Milwaukee. Abrasive Tungsten Carbide, 1⁄4" (6.3mm) Dia. X 1⁄2" (12.7mm) Length TX-14-EC - Extreme - Very Coarse - Head Diameter: 1⁄4", Head Length: 1⁄2"