Sandvik Coromant Turning Insert, Basic Shape, Series: T-Max® P, TNMG Insert, 321 Insert, Triangular, 0.157 in Maximum Depth of Cut, 3/8 in Inscribed Circle, 1/8 in Thickness, 0.649 in Length, 16 Seat, Negative Rake, QM Chipbreaker, 0.0156 in Corner Radius, 0.15 in Hole Dia, Manufacturer's Grade: 4325, ANSI Code: TNMG 321-QM 4325, ISO Code: TNMG 16 03 04-QM 4325, 60 deg Included Angle, 0 deg Relief Angle, Neutral Cutting, Carbide, CVD-TiCN+Al2O3+TiN Coated, Material Grade: K, P, For Use On: Cast Iron and Steel