Review on HONEYSEW Bobbins Machine15 30 2996 15PCS BOBBINS Sewing Set: High-Quality Bobbins for Seamless Stitching by Barbara Simmons

The bobbins that seem to work best in my vintage machines are the heavier, stronger boxes. Less play and skipped stitches than "holey" metal or plastic. Typically about 10% of the spools in a large batch like this are unusable because they are misaligned and cannot be loaded on a vintage spooling machine without tools. fix, but it's very good. I don't see any misaligned ones and all the ones I've used filled in smoothly and evenly. The storage box is also very good - the only place to store the coils worth the space is the silicone ring - this box keeps the coils just as tidy.