FinishingMediumFinishingMediumMediumRoughing FinishingMediumMedium INSERT SELECTION GUIDE Geometry recommendations for (Negative)  Steel Stable Unstable WA FS FG FM FT PC MM MT  Stainless Steel  High Temp. Alloys Stable Unstable Stable Unstable EA EA EM MK MM GG-ML EM MK MM  Cast Iron  Non-ferrous Stable Unstable Stable Unstable MG- GG-ML MA- 175