Pramet Turning Insert Pramet, SNMA Insert, 856 Insert, Squared, 0.472 in Maximum Depth of Cut, 1 in Inscribed Circle, 5/16 in Thickness, 1 in Width, 1 in Length, 25 Seat, Negative Rake, 3/32 in Corner Radius, 0.359 in Hole Dia, Manufacturers Grade: T5305, ANSI Code: SNMA 856:T5305, ISO Code: SNMA 250724:T5305, 90 deg Included Angle, 0 deg Relief Angle, Carbide, Material Grade: H, K, P, For Use On: Steel, Cast Iron and Hardened Steel