[tptacek]

The binder clip article has many of the same merits as the paper clip article. The bulldog clip article is more interesting: it's a "stub" article (its authors are explicit about the fact that it's not a complete article), and still it manages to track down some of its history and cite interesting uses from books – someone had to read those books and fish the bulldog clip cites out of them.

I think it's pretty clear to anyone why bulldog clips are in the encyclopedia, and it is only clear to subject matter experts with strong opinions why Arrow would be.

If your topic requires subject matter expertise in order to recognize its importance, the standards are unequal: you are going to need to do more work to establish its notability, because you cannot reasonably expect the layperson volunteers in the Wikipedia project to do that work for you.