Sandvik Coromant Turning Insert, Basic Shape, Series: T-Max® P, TNMA Insert, 438 Insert, Triangular, 0.394 in Maximum Depth of Cut, 1/2 in Inscribed Circle, 0.187 in Thickness, 0.866 in Length, 22 Seat, Negative Rake, KR Chipbreaker, 1/8 in Corner Radius, 0.2029 in Hole Dia, Manufacturer's Grade: 3215, ANSI Code: TNMA 438-KR 3215, ISO Code: TNMA 22 04 32-KR 3215, 60 deg Included Angle, 0 deg Relief Angle, Neutral Cutting, Carbide, CVD-TiCN+Al2O3+TiN Coated, Material Grade: K, For Use On: Cast Iron