Pramet Turning Insert Pramet, SNMM Insert, 856 Insert, Squared, 0.63 in Maximum Depth of Cut, 1 in Inscribed Circle, 5/16 in Thickness, 1 in Width, 1 in Length, 25 Seat, Negative Rake, OR Chipbreaker, 3/32 in Corner Radius, 0.359 in Hole Dia, Manufacturers Grade: T9315, ANSI Code: SNMM 856-OR:T9315, ISO Code: SNMM 250724E-OR:T9315, 90 deg Included Angle, 0 deg Relief Angle, Carbide, Material Grade: H, K, P, For Use On: Steel, Cast Iron and Hardened Steel