General purpose carbide ball end mills are intended for milling a wide variety of common materials but are not suitable for milling hard materials like titanium or gummy materials like aluminum. Roughing end mills remove large amounts of material from a workpiece more quickly than roughing/finishing end mills. Carbide end mills provide excellent wear resistance and heat resistance, and they are harder than high-speed steel or cobalt steel end mills. Ball end mills have a rounded nose that creates a round-bottomed groove in milling tasks. Also known as ball-nose end mills, they are rotated against a workpiece to make round-bottomed slots and pockets or mill complex shapes without sharp corners.