Review on 144pcs Simthread Pre-Wound Bobbins Thread for Bernina Pfaff Ambition BabyLock Brother Embroidery and Sewing Machines - Class 15 Type A Size SA156, Polyester Black 60 wt, Plastic Side (Black) by Karla Richter

In general this thread works fine now. At first my machine didn't like it that much and the bobbins jumped when sewing. The bobbins need to be the right size for my machine. I started using Teflon "coil washers" and it made a world of difference! I use them in my Juki sewing machine for quilting and general sewing, not machine embroidery. With the addition of spool washers they now work fine. I like that they are ready to switch when the spool runs out. I don't have to stop and get a new one, just grab one from the box and plug it in! They also seem to hold more thread than the bobbins,