Niagara Cutter N35120 High Speed Steel Square Nose End Mill, Weldon Shank, TiN Finish, Roughing/Finishing Cut, Non-Center, 30-Degree, 4-Flute, 2.5" OAL, 0.375" Cut Diameter, 0.3750" Shank Diameter Number of flutes varies; fewer flutes have more chip-carrying capacity and more flutes produce a finer finish 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 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