The indispensable key to the induction matrix, which came from the personal effects of the fabled Dr. Von Rosenstein, has been replicated in intricate detail. The key was a vital part of Dr. Von Rosenstein's awesome 18th century, Post Mortem Cognitive Transfer technology apparatus. The ring is crafted in Fine English pewter with a pierced and etched brass inlay. This a unique statement piece for the steampunk or gothic enthusiast. It comes in sizes 8 1/2, 9 1/2, 11 and 12.