Sandvik Coromant Threading Insert, Series: CoroThread 266, 266LL Insert, 16 Insert, Triangular, Internal, Metric, 3 mm Pitch, 9.525 mm Inscribed Circle, 3.969 mm Thickness, ANSI Code: 266LL-16MM01A300M 1125, ISO Code: 266LL-16MM01A300M 1125, A Chipbreaker, Negative Rake, 60 deg Included Angle, Manufacturers Grade: 1125, Left Hand Cutting, Carbide, TiCrAlN/TiAlN, Material Grade: H, K, M, N, P, S