I have the Sidewinder Deluxe it has 4 interchangeable pins, it's the only one that fits my Pfaff. I am very happy with mine. The Deluxe model does give you the ability to adjust the tension, and how full you want to fill the bobbin. I did buy the smaller, lesser expensive model first which did not fit my Pfaff 2044. I was able to return it to JAF's . The bobbin winder on my Pfaff is only working at half capacity so the sidewinder has been money well spent. I would recommend the more expensive Deluxe model. Good Luck on your decision.