Indexable Carbide Insert - Suitable for engraving all types of materials, such as plastic, non-ferrous metal, aluminum, copper, carbon steel and stainless steel. Full peripherally ground insert to ensure efficient repeatability. It performs excellently without producing any burrs, especially in copper, aluminum and stainless steel. NC2032: Long tool life. For all kinds of steel from 30-50 HRC, carbon steel, alloy steel and cast iron.