Sandvik Coromant Threading Insert, Series: T-Max Twin-Lock, R166.39G Insert, 24 Insert, Rectangle Shape, External Thread, API Round Thread Standard, 8 Threads per Inch, 1/4 in Thickness, 24 mm Length, ANSI Code: R166.39G-24RD13-080 1125, ISO Code: R166.39G-24RD13-080 1125, A Chipbreaker, Manufacturers Grade: 1125, Right Hand Cutting Direction, Carbide, TiAlN, Material Grade: K, M, N, P, S