I dont use them nor have I ever, they are from an estate. What machine or what else they can be used for, I can't answer that. Just figured I would offer them on here because I am sure others could put them to good use.
Okay, I was curious so did research. Yes they are bobbins, but bobbins that hold thread to make hand made lace. Usually European, English, Swiss, African. I have seen ladies using these types to hand make their lace. Just wanted to know. Lynda