The RedLine Tools 1/2 4 Flute Carbide Corner Radius End Mill is a precision cutting tool designed for demanding machining applications. Made in the USA from high-quality carbide material, this end mill features a 0.5-inch cutting diameter and a 0.5-inch shank diameter for secure tool holding. The 4-flute design with variable helix and variable index geometry helps reduce chatter and improve surface finish while maximizing material removal rates. With a corner radius of 0.06 inches, this tool provides enhanced edge strength and extended tool life compared to sharp corner designs. The AlTiSN finish coating offers superior heat resistance and wear protection during high-speed machining operations. Measuring 2.5 inches in length with a 0.63-inch width, this round-shaped end mill weighs just 10 grams, making it ideal for both roughing and finishing operations in various materials. The variable helix angle design further contributes to vibration dampening and improved chip evacuation. Model number REP4129 represents RedLine Tools' commitment to manufacturing precision cutting tools for professional machinists and manufacturing operations.