For joining knitted fabrics. Sewing on thick cords, strings of beads and sequins. For making and sewing in piping in a single operation. For 5.5 mm and 9 mm machines. Originally designed for stitching heavy sweater knits; now the most common use for this foot is making custom piping to accent seams and edges of garments, pillows, purses and other handcrafted projects #12 works with machines with max stitch width of 5.5 mm and #12C is the coded version that works with machines with max stitch width of 9 mm

Compatibility

125, 125 S, 130, 135, 135 S, 140, 145, 145 S , 150, 153, 153 QE, 155, 160, 163, 165, 170, 180, 185, 200, 210, 220, 230, 230 PE, 240, 430, 435, 440 QE, 450, 630, 640, 730 B 215, B 325, B 330, B 335,B 435, B 475 QE, B 480, B 350 PE, B 380, B 530, B 535,B 540, B 550 QE, B 555, B 560, B 570 QE, B 570 QE/QEE, B 590, B 580, B 710, B 720, B 740, B 750 QE, B 770 QE/QEE, B 780, B 790, B 790 PLUS, B 820 QE, B 830, B 880, B 880 PLUS.