Widin Carbide Square End Mill For Mold & Die - Variable Index 4 Flute For Powerful Cutting - 18mm x 45mmA high performance end mill designed to excel in mold and die machining applications. With a cutting diameter range of 1. 0mm to 20. 0mm and a cutting diameter tolerance of +0 0. 03mm, it offers precision and versatility for various workpiece sizes. The variable index flutes with helix angles of 29 and 31 contribute to increased tool life by reducing chatter vibrations and resonance, resulting in improved cutting stability. The gash tooth shape is