Sandvik Coromant Drilling Insert, Series: Coromant U, WCMX-58 Insert, 050308 Insert, Trigon, 5/16 in Inscribed Circle, 1/8 in Thickness, 58 Chipbreaker, 0.0314 in Corner Radius, 0.1259 in Hole Dia, Manufacturers Grade: 235, 80 deg Included Angle, ANSI Code: WCMX 05 03 08-58 235, Right Hand, ISO Code: WCMX 05 03 08-58 235, Asymmetrical Point, Medium Feed, For Use On: Steel and Stainless Steel, Carbide, TiCN/TiN, Material Grade: M, P