Precision machining demands precision tools, and this RedLine Tools 4-Flute Variable Index and Helix Corner Radius Square End Mill delivers exceptional performance for professional applications. Made in the USA from premium carbide material, this end mill features a 0.25-inch cutting diameter with a matching 0.25-inch shank diameter for stability during operation. The variable helix design reduces chatter while the variable index spacing minimizes harmonics, resulting in superior surface finishes. With a corner radius of 0.01 inches, this tool excels at creating smooth transitions between surfaces. The advanced AlTiSN finish provides enhanced durability and heat resistance for extended tool life. Measuring 2.5 inches in length with a 0.75-inch width, this compact yet powerful REP4052 model weighs just 10 grams, making it easy to handle while maintaining rigidity during cutting operations. Perfect for precision machining tasks requiring exceptional accuracy and surface quality.