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 variable index design reduces chatter and improves surface finish while extending tool life. With a square end cut type and 0.25-inch shank diameter, this versatile end mill delivers consistent results across various materials. The compact design measures just 2 inches in length and weighs only 10 grams, making it easy to handle and store. Each package contains one high-quality end mill, perfect for professional machinists and fabrication shops demanding precision and reliability.