Turning insert with a tough substrate, cobalt enriched layer combined with multilayer CVD coating. Recommended for general use machining of steel in a wide range of conditions, featuring high toughness and wear resistance. 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.