Yamaloy: DNMG 110404-NM4 Insert Grade QX5020 DNMG Turning Inserts 55 Rhombic Insert Insert Grade QX5020 (ISO P10-P35 M10-M30 K10-K30) CVD Coated. An excellent general purpose grade for medium roughing on Steels, Stainless and Cast Irons. Chip Breaker: NM4. Application: Med Cut. Grades: QX505 (ISO K05-K15) Coated. Used for finishing, semi finishing and medium roughing of Cast Irons including Malleable and Nodular Irons, at high speed. QX5020 (ISO P10-P35 M10-M30 K10-K30) CVD Coated. An excellent general purpose grade for medium roughing on Steels, Stainless and Cast Irons. QX520 (ISO P10-P35 M10-M30 K10-K30) Coated. An excellent general purpose grade for medium roughing on Steels, Stainless and Cast Irons. QX530 (ISO P25-P35 M15-M25) Coated.- Turning grade for Steels, Cast Steels and Stainless Steels. A good general purpose Steel grade for roughing. QX535S (ISO M10-M30) CVD Coated. For roughing and finishing turning applications on a wide variety of Stainless Steels. QX8010 (ISO M10