Turning insert with a very tough substrate with cobalt enriched layer and MTCVD coating and a special SUMOTEC surface treatment. Suitable for machining steel and alloy steel at low to medium cutting speeds and medium to high feeds. Features very high toughness with excellent results in heavy machining, unstable conditions and interrupted cuts. Insert for semi-finishing and finish turning. Chip breaking in moderate feed range. Positive rake, low cutting forces. Used for a wide range of materials including soft and exotic alloys.