They say "Uneasy lies the head that wears a crown". And given the weight of the bloody things, we can understand why. How you could be assassinated when you could simply take one of these off and bludgeon someone to death boggles us.
A lot of jewelery is for fine and dainty fingers. This is not one of those rings.
A vegvísir, Icelandic for "sign post" or "wayfinder", is an Icelandic magical stave intended to help the bearer find their way through rough weather. The symbol is described in the Huld Manuscript as potent protection for travellers.