Whats with this strange looking Dexter brake adjuster?

Sorry..... I should have been clear in saying that I took apart another wheel to confirm what was missing and how things should look. Not only is the destroyed adjuster smooth but the other brake assembly looks exactly the same. So yes, these are some odd looking "non star wheel" adjusters. I'm surprised to see that no one has heard of them because they're not smoothed off or replaced. These are Dexter parts from around the year 2005 and they have maybe 2000 miles on them. I'll be calling Dexter tomorrow. :h