Precision Twist EB6304 Carbide Ball Nose End Mill, Long Reach, Uncoated (Bright) Finish, Non-Center Cutting, 30 Deg Helix, 4 Flutes, 6" Overall Length, 1" Cutting Diameter, 1" Shank Diameter Suitable for machining steel, hardened steel, steel alloys, stainless steel, cast iron, copper, brass, bronze, aluminum, and aluminum alloys Long length end mills have longer cutting edges and can make deeper cuts than standard length end mills Four flutes produce a better finish than fewer flutes Carbide can run at higher speeds than high-speed or cobalt steel, resisting wear and high cutting temperatures Uncoated (bright) tools have no additional surface treatment or coating for use on a range of materials