These do NOT fit Bobbins for the Bernina 730 model, nor did they fit the bobbins for my old White brand sewing machine. The spindle diameter on this product is too big around to put the bobbins on. My husband could not even squeeze the prongs together to make them fit. Would cost me $2.80 to ship them back to the warehouse - the brick-and-mortar stores will not accept merchandise for a return that was purchased online.
It's always been a pain storing bobbins separately from spools. Then, trying to match which color bobbin goes with which color thread. The short end of the pin sticks firmly in the spool, then 1 or 2 bobbins slide over the longer pin. I put them on a wall thread holder. It is soooo nice to not have to search through bobbins. I need more!!
I can across bobbin mates by accident, but what a blessing. I brought all that the store had and now need more. These are so great to keep bobbin and thread together.
Too often I have threaded up a bobbin, done my sewing and found that I already had a bobbin with that color thread -- and been stuck with TWO bobbins. When I found the Bobbin Mates, I bought them and immediately kicked myself for not buying more. I'm delighted to find them here on this website and am stocking up. They are a blessing in a busy sewing box.