Precision Twist E6304 Carbide Square Nose End Mill, Long Reach, Uncoated (Bright) Finish, 30 Deg Helix, 4 Flutes, 6" Overall Length, 1/2" Cutting Diameter, 1/2" Shank Diameter Four flutes produce a better finish than fewer flutes Extra-long length end mills have longer cutting edges and can make deeper cuts than long-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 Square nose end mills (also called square end) create sharp, unrounded cuts