Pramet Turning Insert Pramet, SNMA Insert, 643 Insert, Squared, 0.35 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, 3/64 in Corner Radius, 0.313 in Hole Dia, Manufacturers Grade: T5305, ANSI Code: SNMA 643:T5305, ISO Code: SNMA 190612:T5305, 90 deg Included Angle, 0 deg Relief Angle, Carbide, Material Grade: H, K, P, For Use On: Steel, Cast Iron and Hardened Steel