I have thought about finding a tool for that use, but dismissed John's creative writing because none of the chairs at my house that need the dowels scraped and reglued are small enough to fit that tool. And on the links I sent you'll notice that there is also a right angle. I wonder if it has an upholstery use, for pulling and stringing cords and straps?

Do you know how bar codes work? The black lines look like they're the working part, but I read somewhere that it is actually the white between them that is more important. In an analogous examination of the tools, if you look not at the semi-circular shapes notched out of the disk, but look at the shapes between the notches, then there might be another answer.

SRS