Seco Turning Insert, VBMT Insert, 21.5 Insert, Diamond, 1/4 in Inscribed Circle, 2.38 mm Thickness, 11.07 mm Length, 11 Seat, Positive Rake, F1 Chipbreaker, 0.8 mm Corner Radius, 2.9 mm Hole Dia, Manufacturers Grade: TP25, ANSI Code: VBMT21.52-F1, ISO Code: VBMT110208-F1, 35 deg Included Angle, 5 deg Relief Angle, Neutral Cutting, Carbide, TiCN/Al2O3, For Use On: Steel, Stainless Steel and Cast Iron