Turns out they are quite obviously for winding skeins into balls! And low and behold, I had skeins with me.
 |
| Umbrella Swift - open your skein and slip it over the umbrella. |
 |
| Attached the end of the skein to the Winder and giv'er! (turn the handle, that is) |
 |
| Yarn BEFORE |
 |
| Yarn AFTER |
It went so fast I was actually sad when it was over.
