ROYAL LANGNICKEL-Compact Art Your Own Engraving Art Keychains. These compact kits come packed in CD cases and are ready to be used at home; camp; in the car; on the plane and just about anywhere else. This kit contains three key-chains; three engraving boards cut to fit key chains and a scraper tool. Conforms to ASTM D4236. WARNING: Choking Hazard-small parts and functional sharp objects. Not for children under 3 years. Imported.