Sandvik Coromant Turning Insert, Series: T-Max P, CNMM Insert, 644 Insert, Diamond, 12 mm Maximum Depth of Cut, 3/4 in Inscribed Circle, 1/4 in Thickness, 19 Seat, Negative Rake, QR Chipbreaker, 0.062 in Corner Radius, 0.312 in Hole Dia, Manufacturers Grade: 4315, ANSI Code: CNMM 644-QR 4315, ISO Code: CNMM 19 06 16-QR 4315, 80 deg Included Angle, 0 deg Relief Angle, Neutral Cutting, Carbide, TiCN/Al2O3/TiN, Material Grade: K, P, For Use On: Cast Iron and Steel