YG-1 E5067 Carbide Square Nose End Mill, TIALN Multilayer Finish, Non-Center Cutting, 45 Deg Helix, 5 Flutes, 3.5" Overall Length, 0.625" Cutting Diameter, 0.625" Shank Diameter Suitable for general-purpose machining on stainless steel and nickel-based alloys Five flutes produce a better finish than fewer flutes 45-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