The RedLine Tools 4-Flute Variable Index and Helix Radius Square End Mill is a precision cutting tool engineered for demanding machining applications. Made in the USA from premium carbide material, this end mill features a 3/4 inch cutting diameter with a corner radius of 0.015 inches, designed to deliver superior performance and extended tool life. The variable helix and variable index geometry work together to reduce chatter and vibration during cutting operations, resulting in improved surface finishes and enhanced productivity. Coated with an advanced AlTiSN finish, this end mill provides excellent heat resistance and wear protection, making it ideal for machining a wide range of materials. The 4-flute design offers an optimal balance between material removal rates and chip evacuation, while the 1 inch shank diameter ensures secure tool holding and stability. Whether you're working on production runs or precision prototyping, this corner radius end mill delivers the reliability and performance that professional machinists demand.