Double-sided 80° rhombic inserts with a positive rake angle and sharp, positive-radial edge. Used for machining very ductile materials such as aluminum alloys, soft, low carbon steel, stainless steel, and high temperature alloys. A tough sub-micron substrate, PVD coated. Suitable for low-to-medium cutting speeds. Developed for machining of heat resistant alloys, austenitic stainless steel and hard steel.