Precision Twist E3302 Carbide Square Nose End Mill, Uncoated (Bright) Finish, 30 Deg Helix, 2 Flutes, 3" Overall Length, 1/2" Cutting Diameter, 1/2" Shank Diameter Suitable for machining steel, hardened steel, steel alloys, stainless steel, cast iron, copper, brass, bronze, aluminum, and aluminum alloys Two flutes offer better chip-carrying capacity than end mills with more flutes, enhancing the tools ability to remove material 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 Center-cutting design allows the end mill to plunge into material like a drill bit while also performing conventional surface milling