Niagara Cutter N85436 Carbide Square Nose End Mill, Inch, TiAlN Finish, Roughing and Finishing Cut, 30 Degree Helix, 2 Flutes, 1.5" Overall Length, 0.125" Cutting Diameter, 0.125" Shank Diameter Two flutes offer better chip-carrying capacity than end mills with more flutes, enhancing the tools ability to remove material Titanium aluminum nitride (TiAlN) coating lubricates the end mill for high-temperature stability and abrasion resistance at high cuttings speeds, offering better heat resistance than TiN and TiCN coatings Carbide can run at higher speeds than high-speed steel, resisting abrasion and high cutting temperatures 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