This key is rather unusual. It is a large skeleton key made from brass or bronze and it is large and quite heavy. What is odd about it is that the key has a twist in it. It is impossible to twist the key by hand so it appears to have been made that way. This is an old key so it has signs of wear and we have not cleaned it. It is a bit more than 3 5/16 inches tall. Perfect for assemblage or steampunk projects.