Pramet Turning Insert, RNMG Insert, 64 Insert, Round, 0.236 in Maximum Depth of Cut, 3/4 in Inscribed Circle, 1/4 in Thickness, 19 Seat, Negative Rake, 8 Chipbreaker, 1/4 in Hole Dia, Manufacturers Grade: T9315, ANSI Code: RNMG 64-08 T9315, ISO Code: RNMG 190600E-08 T9315, 0 deg Relief Angle, Carbide, Material Grade: H, K, P, For Use On: Hardened Steel, Cast Iron and Steel