❣ Skeleton Key: American term for a lever or "bit" type key. The term derives from the fact that the key has been reduced to its essential parts. The term is also often misapplied to refer to any antique key.
When I first moved to kentucky we had real skeleton keys to get into our farmhouse. Design Your Own Vintage Typewriter Key & Large Skeleton Key Necklace-Personalized Gift-Initials-Recycled-Letters-Numbers