After reading these postings, I ordered the bobbin savers combo from Nancy's Notions. I have 3 now, one for embroidery bobbins, one for sewing bobbins, and one for quilting bobbins. When my new bobbin savers come, the first one will be for my Singer 221 bobbins. I love the bobbin savers and the three I have are filled so I'll be using the new ones, especially for extra sewing bobbins.