Magic Genie's Snap In Bobbin Washers - Size L

SEW EASY! These slick space-age washers eliminate the backlash in the bobbin when changing directions at high speed. Backlash creates "bird's nests" in free-motion quilting and embroidery. Just drop a LITTLE GENIE in the bobbin case, replace the bobbin, and you're good to go! Fits all domestic machines. Designed by author, teacher, and award-winning quilter Sharon Schamber. Package of 12. Tough and long-lasting.