Pramet Turning Insert, TCMT Insert, 1.81.51 Insert, Triangular, 2.5 mm Maximum Depth of Cut, 5.56 mm Inscribed Circle, 3/32 in Thickness, 9.5 mm Length, 9 Seat, Positive Rake, FF2 Chipbreaker, 0.4 mm Corner Radius, 2.5 mm Hole Dia, Manufacturers Grade: T9315, ANSI Code: TCMT 1.81.51-FF2 T9315, ISO Code: TCMT 090204E-FF2 T9315, 60 deg Included Angle, 7 deg Relief Angle, Carbide, Material Grade: H, K, P, For Use On: Hardened Steel, Cast Iron and Steel