Sandvik Coromant Milling Insert, Series: CoroMill 331, N331.1A..E-KM Insert, 54508 Insert, Rectangle Shape, 0.256 in Inscribed Circle, 0.175 in Thickness, 0.374 in Width, 0.256 in Length, KM Chipbreaker, 0.031 in Corner Radius, Positive Rake, 90 deg Lead Angle, 0.1141 in Diameter Hole, Manufacturers Grade: 1020, ANSI Code: N331.1A-05 45 08E-KM1020, ISO Code: N331.1A-05 45 08E-KM1020, Neutral Hand of Insert, Carbide, TiAlN, Material Grade: K, Cast Iron Material Application