YG-1 EH970 Carbide Square Nose End Mill, Long Reach, TIALN Multilayer Finish, Roughing Cut, 45 Deg Helix, 4 Flutes, 3" Overall Length, 0.5" Cutting Diameter, 0.5" Shank Diameter Roughing end mills have chip-breaking cutting edges that remove material in less time than conventional end mills Fine-pitch tooth design and tool geometry are suitable for machining steel up to Rockwell hardness C45, stainless steel, titanium alloys, and nickel-based alloys Long-reach end mills have an extended shank for access to recessed areas of the workpiece 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