The 25/64 Cobalt Parabolic Jobber Drill is designed for high-performance drilling in tough materials. With a diameter of 0.3906 inches, this drill features a parabolic flute design that enhances chip removal and reduces friction. Made from cobalt steel, it offers superior heat resistance and durability, making it ideal for high-speed applications. This jobber drill is perfect for professionals in metalworking and construction, providing reliable performance and precision in every drill. Upgrade your toolkit with this high-quality cobalt drill.