YG-1 E5982 Carbide Square Nose End Mill, Extra Long Reach, Uncoated (Bright) Finish, Finishing Cut, Non-Center Cutting, 45 Deg Helix, 3 Flutes, 3.5" Overall Length, 0.375" Cutting Diameter, 0.375" Shank Diameter Suitable for high-performance machining on aluminum and other nonferrous materials Long-length end mills have longer cutting edges and can make deeper cuts than standard-length end mills 45-degree helix provides increased cutting action compared to end mills with lower helix angles Three flutes provide better chip-carrying capacity than four flutes and a finer finish than two, reducing the need for a second finishing cut in some applications Carbide can run at higher speeds than high-speed or cobalt steel, resisting wear and high cutting temperatures