This RedLine Tools 4-Flute Variable Index and Helix Corner Radius Square End Mill (REP4053) is precision-engineered for superior performance in machining applications. Made in the USA from premium carbide material, this 0.25-inch cutting diameter end mill features a variable helix design that reduces chatter and improves surface finish quality. The 0.02-inch corner radius provides strength at cutting edges while maintaining precision. With its AlTiSN finish, this tool offers excellent wear resistance and extended tool life even in demanding applications. The 0.25-inch shank diameter ensures compatibility with standard collets and tool holders. Its unique variable index design helps optimize chip evacuation and cutting efficiency. This versatile end mill is ideal for professional machinists requiring consistent, high-quality results in various materials.