KYOCERA Turning Insert, Multi-Edge, CNGA Insert, 431 Insert, Diamond, 1/2 in Inscribed Circle, 3/16 in Thickness, 12 Seat, Negative Rake, ME Chipbreaker, 1/64 in Corner Radius, 0.203 in Hole Dia, Manufacturer's Grade: KBN05M, ANSI Code: CNGA431S00525ME KBN05M, ISO Code: CNGA120404S01225ME KBN05M, 80 deg Included Angle, 0 deg Relief Angle, Neutral Cutting, CBN, MEGACOAT, Material Grade: H, For Use On: Hardened Materials