Cobra Carbide burr with ball end. Solid carbide tools offer long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid toolholding systems. Round shanks allow use with a wide variety of toolholding systems. Single-cut style has rows of teeth cut in a single direction for slower material removal and smoother finishes. High stock removal and excellent surface finish on relatively hard materials. Right hand spiral flute. General purpose use on cast iron, steel, copper and brass alloys. Designed for rapid stock removal and excellent surface finishes. Solid 1/4" carbide shank. 2-inches overall length.