Widin Carbide Square End Mill For Mold & Die - 4 Flute Variable - 9mmA high performance end mill designed for precision machining in mold and die applications. It offers a wide cutting diameter range from 0. 8mm to 25. 0mm, providing versatility for various machining tasks. With a tight cutting diameter tolerance of +0 0. 03mm, this end mill ensures precise and accurate cutting results. The variable index flutes, with a helix angle of 29 for the first flute and 31 for the second flute, contribute to increased tool life