It has been designed for aerospace alloy turning and can meet the demands of machining aerospace type components, according to ATI Stellram. The Geometry is manufactured from high-nickel, high-cobalt, and titanium-based alloys.

ATI's grade can be used as an approved aerospace substrate, and has a nano TiAIN layer PVD coating. The 4E’s combination of a new super-hard coating with micro-grain carbide substrate improves heat and wear resistance in high temperature alloy machining, enabling longer tool life and higher productivity.

It has a reinforced chipbreaker profile with positive cutting action which reduces built-up edge, leaving a smooth surface finish and greater component dimension integrity. The 4E is designed to machine a wide variety of materials, including stainless steels, high nickel, high cobalt, and titanium-based alloys, helping to reduce shop inventory, operator error, and cost.