This RedLine Tools 4-Flute Variable Index and Helix Square End Mill (REP4050) is a precision-engineered cutting tool made in the USA. Featuring a 0.25-inch cutting diameter and carbide construction, this square end mill delivers exceptional performance for professional machining applications. The variable helix and variable index design reduces chatter and improves surface finish while extending tool life. Finished with AlTiSN coating for enhanced durability and heat resistance, this end mill maintains sharpness through demanding operations. The 0.25-inch shank diameter ensures compatibility with standard tool holders. Weighing just 10 grams, this compact yet robust tool measures 2.5 inches in length and 0.75 inches in width, making it suitable for precision milling tasks. Each package contains one high-quality end mill ready for immediate use in your machining projects.