Niagara Cutter N85956 Carbide Square Nose End Mill, Inch, Uncoated (Bright) Finish, Roughing and Finishing Cut, 30 Degree Helix, 3 Flutes, 4" Overall Length, 1.000" Cutting Diameter, 1.000" Shank Diameter Three flutes provide better chip-carrying capacity than four flutes and a finer finish than two, reducing the need for a second finishing cut in some applications Square nose end mills (also called square end) create sharp, unrounded cuts Center-cutting design allows the end mill to plunge into material like a drill bit while also performing conventional surface milling Carbide can run at higher speeds than high-speed steel, resisting abrasion and high cutting temperatures Uncoated (bright) tools have no additional surface treatment or coating for use on a broad range of materials