Chip breaker overview Indexable drills Drilling PM P M K A Turning For machining of steel, stainless steel and cast iron. EM P M S B Milling For machining of steel, stainless steel and heat-resistant alloys. PG P K C For machining of steel and cast iron. Drilling D P M K For machining of steel, stainless steel and cast iron. D Information 53 P M K N Technical For machining of steel, stainless steel, cast iron and non-ferrous metals. E Index C3