The KG9Z-SK is a replacement engraving insert pair designed for use with IDEC's L6 Series 16mm (5/8") miniature switches and pilot devices. These inserts are used to customize and label the switch operators, allowing users to add engraved text or symbols to identify switch functions in control panels and industrial applications. The inserts are compatible with all L6 Series switch styles including pushbuttons, selector switches, key switches, and illuminated variants. They provide a practical solution for panel customization and operator identification without requiring replacement of the entire switch assembly. The KG9Z-SK is part of IDEC's comprehensive L6 Series accessory lineup, which includes tools, guards, bezels, and replacement components to support long-term maintenance and reconfiguration of installed switches.