The #21 Cobalt Parabolic Jobber Drill Bit by Field Tool Supply is engineered for high-performance drilling in hard materials. This drill bit features a parabolic flute design that optimizes chip removal and reduces friction, making it suitable for high-speed operations. Made from premium cobalt steel, it provides exceptional durability and heat resistance, ensuring a longer lifespan even in tough applications. With a diameter of 0.1590 inches, this bit excels in drilling stainless steel, titanium, and other challenging metals. The 135-degree split point design facilitates quick penetration and minimizes bit walking. This drill bit is compatible with standard drill chucks and adheres to ANSI quality standards.