Weak magnets!
Nice idea, but poorly executed.  The magnets are too weak!  I’ve used these for less than two days, and one of the backing magnets has already detached and gone missing (I was pulling my needlework out of the bag it was in, the bobbin part caught, and the backing magnet went bye bye).  Debating whether to buy stronger magnets, or just return these.  I’m using a Readerest Magnetic Eyeglass Holder for keeping my needles from getting lost; it has stayed firmly attached for over a month, and is still going strong.  In fact, maybe I’ll try using a Readerrest Back to attach the bobbin, and see if that will work for me.
Rating: 2 stars