Sandvik Coromant Milling Insert, Series: CoroMill 390, R390-18..M-PM Insert, 180612 Insert, Rectangle Shape, 0.433 in Inscribed Circle, 0.249 in Thickness, 0.433 in Width, 0.726 in Length, PM Chipbreaker, 0.047 in Corner Radius, Positive Rake, 90 deg Lead Angle, 0.163 in Diameter Hole, Manufacturers Grade: 4220, ANSI Code: R390-18 06 12M-PM 4220, ISO Code: R390-18 06 12M-PM 4220, Right Hand of Insert, Carbide, TiCN/Al2O3/TiN, Material Grade: K, P, Cast Iron and Steel Material Application