This RedLine Tools 4-Flute Variable Index and Helix Square End Mill (REP4058) is a precision cutting tool made in the USA from high-quality carbide. Featuring a 0.25-inch cutting diameter and matching 0.25-inch shank, this square end mill is designed for superior performance in machining applications. The variable helix and variable index design reduces chatter and provides excellent surface finishes. With its premium AlTiSN finish, this tool offers enhanced durability and heat resistance for extended tool life. The end mill weighs just 10 grams and measures 3 inches in length with a 1-inch width, making it suitable for detailed milling operations. This professional-grade tool comes as a single unit in protective packaging, ensuring it arrives ready for immediate use in your machining projects. Ideal for precision cutting applications where accuracy and tool longevity are essential.