YG-1 E5011 Carbide Square Nose End Mill, Long Reach, Uncoated (Bright) Finish, 30 Deg Helix, 2 Flutes, 3" Overall Length, 0.25" Cutting Diameter, 0.25" Shank Diameter Suitable for general-purpose machining on hardened and high-alloy steel, chromium-nickel steel, steel casting, malleable cast iron, brass, copper, aluminum with a high percentage of silicon, and abrasive plastic Two flutes offer better chip-carrying capacity than end mills with more flutes, enhancing the tools ability to remove material Long-length end mills have longer cutting edges and can make deeper cuts than standard-length end mills 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 broad range of materials