Turning insert with a tough submicron substrate, PVD coated. Suitable for low-to-medium cutting speeds. Developed for machining of heat resistant alloys, austenitic stainless steel and hard steel. Double-sided trigon inserts with a positive rake angle and sharp, positive-radial edge. Used for machining very ductile materials such as aluminium alloys, soft, low carbon steel, stainless steel and high temperature alloys.