Niagara Cutter N52264 High-Speed Steel End Mill, General Purpose, Regular Length, TiAlN Coated, 2 Flutes, Square End, 1-1/2" Cutting Length, 3/8" Cutting 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 cutting speeds, offering better heat resistance than TiN and TiCN coatings High-speed steel is compatible with a variety of materials 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