Niagara Cutter N55703 Carbide Square Nose End Mill, Inch, Uncoated (Bright) Finish, Roughing and Finishing Cut, 30 Degree Helix, 4 Flutes, 3" Overall Length, 1.000" Cutting Diameter, 1.000" Shank Diameter Four flutes produce a better finish than fewer flutes Square nose end mills (also called square end) create sharp, unrounded cuts Titanium nitride (TiN) is a general-purpose coating that combines high-temperature resistance and increased hardness compared to uncoated end mills Carbide can run at higher speeds than high-speed steel, resisting abrasion and high cutting temperatures Center-cutting design allows the end mill to plunge into material like a drill bit while also performing conventional surface milling