Pramet Turning Insert Pramet, WNMG Insert, 434 Insert, Trigon, 0.197 in Maximum Depth of Cut, 1/2 in Inscribed Circle, 3/16 in Thickness, 8 Seat, Negative Rake, RM Chipbreaker, 1/16 in Corner Radius, 0.203 in Hole Dia, Manufacturers Grade: T5305, ANSI Code: WNMG 434-RM T5305, ISO Code: WNMG 080416E-RM T5305, 80 deg Included Angle, 0 deg Relief Angle, Carbide, Material Grade: H, K, P, For Use On: Hardened Steel, Cast Iron and Steel