YG-1 E2079 Cobalt Steel Square Nose End Mill, Weldon Shank, Uncoated (Bright) Finish, Roughing Cut, Non-Center Cutting, 30 Deg Helix, 4 Flutes, 3.25" 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 on a range of materials Number of flutes varies by diameter for optimum feed and cut rate Cobalt steel resists abrasion and high cutting temperatures, and has higher feed rates than high-speed steel Uncoated (bright) tools have no additional surface treatment or coating for use on a range of materials