YG-1 E5058 Carbide Square Nose End Mill, TIALN Multilayer Finish, 40 Deg Helix, 6 Flutes, 3" Overall Length, 0.5" Cutting Diameter, 0.5" Shank Diameter Suitable for finishing on a range of materials Six flutes produce a better finish than fewer flutes 40-degree helix provides increased cutting action compared to end mills with lower helix angles 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 uncoated finish, TiN coating, and TiCN coating Carbide can run at higher speeds than high-speed or cobalt steel, resisting wear and high cutting temperatures