Niagara Cutter N46890 Cobalt Steel Square Nose End Mill, Weldon Shank, TiCN Finish, Finishing Cutting, Non-Center, 30-Degree, 4-Flute, 3.25" OAL, 0.500" Cut Diameter, 0.500" Shank Diameter Number of flutes varies; fewer flutes have more chip-carrying capacity and more flutes produce a finer finish Titanium carbon nitride (TiCN) coating lubricates the end mill for high-temperature stability and offers better abrasion resistance than TiN coating Cobalt steel resists abrasion and high cutting temperatures, and has higher feed rates than high-speed steel Square nose end mills (also called square end) create sharp, unrounded cuts Non-center-cutting design supports peripheral milling and finishing