Widin Carbide Square End Mill For Mold & Die - 4 Flute High Helix (45°) - 12mm x40mmA versatile end mill designed for precision machining in mold and die applications. It offers a cutting diameter range of 1. 0mm to 20. 0mm, providing flexibility for various machining tasks. With a tight cutting diameter tolerance of +0 0. 03mm, this end mill ensures precise and accurate cutting results. The 45 high helix angle reduces cutting load and promotes efficient chip evacuation, resulting in improved performance and reduced tool wear.