This RedLine Tools 4-Flute Variable Index and Helix Corner Radius Square End Mill (REP4071) 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 configuration optimizes chip evacuation. With a corner radius of 0.03 inches, this tool delivers excellent finish quality on corner transitions. The premium AlTiSN finish provides enhanced durability and heat resistance for extended tool life. Measuring 2.5 inches in length with a 0.81-inch width, this compact yet robust tool weighs just 10 grams, making it easy to handle. Ideal for precision milling operations requiring superior surface finish and dimensional accuracy.