This RedLine Tools 4-Flute Variable Index and Helix Corner Radius Square End Mill (REP4075) is precision-engineered for superior performance in machining applications. Made in the USA from high-quality carbide material, this end mill features a 0.31-inch cutting diameter with a matching 0.31-inch shank diameter for stability during operation. The variable helix design reduces chatter and vibration while the variable index spacing minimizes harmonics, resulting in excellent surface finishes. With a corner radius of 0.03 inches, this tool provides strength at critical cutting edges and produces clean corner transitions. The premium AlTiSN finish enhances durability and heat resistance, extending tool life even in demanding applications. Compact and lightweight at just 10 grams, this versatile end mill delivers professional-grade results for precision machining tasks.