Pramet Turning Insert, TNMM Insert, 544 Insert, Triangular, 8.9 mm Maximum Depth of Cut, 15.875 mm Inscribed Circle, 1/4 in Thickness, 27.5 mm Length, 27 Seat, Negative Rake, HR Chipbreaker, 1.6 mm Corner Radius, 6.35 mm Hole Dia, Manufacturers Grade: T9325, ANSI Code: TNMM 544-HR T9325, ISO Code: TNMM 270616E-HR T9325, 60 deg Included Angle, 0 deg Relief Angle, Carbide, Material Grade: K, M, P, S, For Use On: Cast Iron, Stainless Steel, Steel and Titanium/Super Alloys