Pramet Turning Insert, VBMT Insert, 331 Insert, Diamond, 3.6 mm Maximum Depth of Cut, 9.525 mm Inscribed Circle, 3/16 in Thickness, 16.6 mm Length, 16 Seat, Positive Rake, RM Chipbreaker, 0.4 mm Corner Radius, 4.5 mm Hole Dia, Manufacturers Grade: T9315, ANSI Code: VBMT 331-RM T9315, ISO Code: VBMT 160404E-RM T9315, 35 deg Included Angle, 5 deg Relief Angle, Right Hand Cutting, Carbide, Material Grade: H, K, P, For Use On: Hardened Steel, Cast Iron and Steel