YG-1 E5254 Carbide Square Nose End Mill, Uncoated (Bright) Finish, Finishing Cut, 42 Deg Helix, 2 Flutes, 2" Overall Length, 0.1875" Cutting Diameter, 0.25" Shank Diameter Suitable for high-performance plunging and machining on aluminum and other nonferrous materials 42-degree helix provides increased cutting action compared to end mills with lower helix angles Two flutes offer better chip-carrying capacity than end mills with more flutes, enhancing the tools ability to remove material Low surface roughness on the cutting edge reduces friction and prevents chips from sticking to the tool Carbide can run at higher speeds than high-speed or cobalt steel, resisting wear and high cutting temperatures