Niagara Cutter N24488 High Speed Steel Ball Nose End Mill, Weldon Shank, TiN Finish, Roughing and Finishing Cutting, 30-Degree, 2-Flute, 3.875" OAL, 1.500" Cut Diameter, 0.750" Shank Diameter Two flutes offer better chip-carrying capacity than end mills with more flutes, enhancing the tools ability to remove material Titanium nitride (TiN) is a general-purpose coating that combines high-temperature resistance and increased hardness compared to uncoated end mills High-speed steel (HSS) is compatible with a variety of materials Ball nose end mills (also called ball end) create contoured surfaces Center-cutting design allows the end mill to plunge into material like a drill bit while also performing conventional surface milling