I am not confident at this point in any of my razors would give me a good example of how the thumbnail should feel. I know that the only test that matters for an edge is to shave with it. What supprises me is that I apparently didn't get the bevel set on this one, but have gotten two pretty good shaves off it. They weren't as smooth as some of my other razor, but they were pretty nice. I am using a Nanawia 1K.