Double-sided turning insert with a very tough substrate with MTCVD coating with a special SUMOTEC surface treatment. Recommended for machining stainless steel at moderate cutting speeds and medium to high feeds. Features very high toughness with excellent results in heavy machining operations, unstable conditions and interrupted cut. Insert for positive rake angle that varies along the edge to negative in order to prevent chipping. Special design reduces cratering. Used for carbon and alloy steel, stainless steel and high temp. alloys.