Pramet Turning Insert, SNMM Insert, 646 Insert, Squared, 0.472 in Maximum Depth of Cut, 3/4 in Inscribed Circle, 1/4 in Thickness, 3/4 in Width, 3/4 in Length, 19 Seat, Negative Rake, OR Chipbreaker, 3/32 in Corner Radius, 0.313 in Hole Dia, Manufacturers Grade: T9315, ANSI Code: SNMM 646-OR:T9315, ISO Code: SNMM 190624E-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