Option Engraving specializes in IUID Marking. IUID (Item Unique Identification) is part of a compliance process mandated by the United States Department of Defense. IUID marking is a permanent marking method used to give equipment a unique ID. The IUID marking must be maintained and readable throughout the entire life of the object. This process can be applied on the following materials Stainless Steels, Copper, Bronze, Nickel, Aluminum.