Specialty Thread Director Spool Pin Adapter - AllStitch Embroidery Supplies
Amazon.com: CKPSMS Brand- Extra/Spare Sewing Machine Spool pin (The Inner Diameter of The Opening is 3mm) Works for Sewing Machine Bobbin Winder Spindle
2 Pcs Sewing Machine Spool Pin For Most Horizontal Bobbin Winder | eBay