The metal supports that connect the end of the handle to the teeth/tines.
And if you wanna know whay I wanna know. . .
For most rakes, the teeth are one part, which are welded or in some similar fashion attached to these supports. What are the “supports” called. I saw one diagram called them “braces,” but in that one, the tines were attached by a central “connector,” and probably truly did function as braces.
Anyway, I picked up a brand spankin’ new one this weekend. In less than an hour, the teeth became separated on one side. So, I started raking leaves much more gingerly. Within five minutes of the first one popping off, the second one did, too.
