Sandvik Coromant Turning Insert, Series: T-Max®, SPUN Insert, 421 Insert, Squared, 1/2 in Inscribed Circle, 1/8 in Thickness, 1/2 in Width, 1/2 in Length, 12 Seat, Positive Rake, 0.016 in Corner Radius, Manufacturer's Grade: H13A, ANSI Code: SPU 421 H13A, ISO Code: SPUN 12 03 04 H13A, 90 deg Included Angle, 11 deg Relief Angle, Neutral Cutting, Carbide, Uncoated, Material Grade: K, M, N, P, S, For Use On: Cast Iron, Stainless Steel, Non-Ferrous Metals, Steel, Heat-Resistant Super Alloys and Titanium