Pramet Turning Insert Pramet, CNMM Insert, 646 Insert, Diamond, 12 mm Maximum Depth of Cut, 19.05 mm Inscribed Circle, 6.35 mm Thickness, 19.3 mm Length, 19 Seat, Negative Rake, OR Chipbreaker, 2.4 mm Corner Radius, 7.94 mm Hole Dia, Manufacturers Grade: T9315, ANSI Code: CNMM 646-OR:T9315, ISO Code: CNMM 190624E-OR:T9315, 80 deg Included Angle, 0 deg Relief Angle, Carbide, Al2O3, Material Grade: H, K, P, For Use On: Hardened Steel, Cast Iron and Steel