American Carbide Tool Carbide-Tipped Tool Bit for Straight Turning, Left Hand, C5 Grade, 0.25" Square Shank, AL 4 Size AL-style tool shape has a 0-degree side cutting angle for straight turning, facing, or boring to a square shoulder C5 grade uncoated carbide tip for roughing and heavy machining of steel and steel alloys Left-hand cutting direction for left-to-right feed Positive rake angle provides a sharp edge for making continuous cuts Square steel shank fits square toolholders