This very unique Folding Bit Key is believed to have been handmade by a prisoner in New York, probably in a metalworking class. The key is hand hammered and made and features a tapered body. The very unique feature is the bit. Unlikely a normal folding key where the shaft folds in half, the bit on this key folds inwards into the shaft. In this particular key, the bit swings freely. I’ve never seen another one like this and likely never will. It is probably a one of a kind key.The other side of the key:The bit retracted:The bit halfway retracted: