Niagara Cutter N66068 High Speed Steel Square Nose End Mill, Double End, TiN Finish, Roughing and Finishing Cutting, 35-Degree, 2-Flute, 2.25" OAL, 0.188" Cut Diameter, 0.188" Shank Diameter The tool has a 3/16 shank diameter and a smaller cutting diameter, allowing better control over the size of the cut than larger tools when creating precise details and contours Double-end square nose end mills create sharp, unrounded cuts and have cutting edges on both ends for longer tool life 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 is compatible with a variety of materials