Pramet Turning Insert, SNMG Insert, 543 Insert, Squared, 0.315 in Maximum Depth of Cut, 5/8 in Inscribed Circle, 1/4 in Thickness, 5/8 in Width, 5/8 in Length, 15 Seat, Negative Rake, M Chipbreaker, 3/64 in Corner Radius, 1/4 in Hole Dia, Manufacturers Grade: T9315, ANSI Code: SNMG 543-M:T9315, ISO Code: SNMG 150612E-M:T9315, 90 deg Included Angle, 0 deg Relief Angle, Carbide, Material Grade: H, K, P, For Use On: Steel, Cast Iron and Hardened Steel