Solid Carbide End Mill 2mm 2R0.2x2-4x50xD4D1 (Cutting diameter): 2mm D3 (Undercut diameter): 1. 91mm L2 ( Length of cut): 2mm L3 (Length of undercut): 4mm L1 (Total length): 50mm D2 (Shank diameter): 4mm Z (Number of cutting edges): 2 R Corner radius: 0. 2 Helical pitch: 30 Ultrafine carbide grade developed for machining hardened steels Optimized face geometry for long tool life and highest dimensional accuracy Reinforced core for milling up to 70 HRC Tolerance D1: 0. 001 0. 006 mm Tolerance