YG-1 E5245 Carbide Square Nose End Mill, TIALN Multilayer Finish, 30 Deg Helix, 4 Flutes, 2" Overall Length, 0.1875" Cutting Diameter, 0.1875" Shank Diameter Suitable for general-purpose machining on hardened and high-alloy steel, cast iron, and chromium-nickel steel Stub length increases the strength of the tool, making it less likely to break in the workpiece Four flutes produce a better finish than fewer flutes 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 Carbide can run at higher speeds than high-speed or cobalt steel, resisting wear and high cutting temperatures