This RedLine Tools 4-Flute Variable Index and Helix Corner Radius Square End Mill is precision-engineered for superior performance in machining applications. Made in the USA from durable carbide material with an AlTiSN finish, this 0.25-inch cutting diameter tool features a Weldon shank for secure mounting. The variable helix and index design reduces chatter and improves surface finish while extending tool life. With its square end cut type, this versatile end mill (model REP4046, part number REP4045) delivers consistent results across various materials. The compact design measures 2.5 inches in length and weighs just 10 grams, making it easy to handle and install. Perfect for professional machinists and fabrication shops requiring precision cutting tools.