This Kaba Ilco O1007LA-HNBL key blank is designed for Sargent LA keyways and features a 6-pin configuration, indicating it is compatible with lock cylinders that utilize six tumblers. The blank is stamped with "Do Not Duplicate," a common marking used to suggest restrictions on unauthorized key copying, often associated with controlled or restricted key systems. While not always legally binding in all territories, this inscription typically discourages duplication by untrained personnel and may signify a key system with patent protection or controlled distribution by the manufacturer or authorized locksmiths. Key blanks are commonly manufactured from metal alloys such as brass or nickel-silver, selected for durability, ease of cutting, and corrosion resistance. Ilco key blanks, including this model, are used by locksmiths to create new or duplicate keys for existing lock systems.