Chinese "Death Shackles" Leg Irons

Once riveted on to a convict facing a death sentence, these Leg Irons are intended to stay on till the sentence is carried out, and likely on the body forever thereafter. The rivets that hold them closed are hammered in to a slot that is carved in one of the lock plates, in such a way as to prevent their removal without hard engineering effort. They are quite heavy but entirely rounded so they won't damage flesh much, one supposes.