Pramet Turning Insert, VNMG Insert, 331 Insert, Diamond, 3 mm Maximum Depth of Cut, 9.525 mm Inscribed Circle, 4.76 mm Thickness, 16 Seat, Negative Rake, SM Chipbreaker, 0.4 mm Corner Radius, 3.81 mm Hole Dia, Manufacturers Grade: T9315, ANSI Code: VNMG 331-SM T9315, ISO Code: VNMG 160404E-SM T9315, 35 deg Included Angle, 0 deg Relief Angle, Carbide, Material Grade: H, K, P, For Use On: Hardened Steel, Cast Iron and Steel