Pramet Turning Insert, CNMA Insert, 544 Insert, Diamond, 8.5 mm Maximum Depth of Cut, 5/8 in Inscribed Circle, 1/4 in Thickness, 0.634 in Length, 16 Seat, Negative Rake, 1.6 mm Corner Radius, 1/4 in Hole Dia, Manufacturers Grade: T5305, ANSI Code: CNMA 544:T5305, ISO Code: CNMA 160616:T5305, 80 deg Included Angle, 0 deg Relief Angle, Carbide, Al2O3, Material Grade: H, K, P, For Use On: Hardened Steel, Cast Iron and Steel