With Darning foot #9, small holes and tears in fabrics practically repair themselves. The hopper mechanism combined with the vertical spring presses the foot firmly to the project, preventing the material from pulling up withthe needle during sewing (flagging) and ensuring a neat stitch pattern. The special shape of Darning foot #9 also makes it ideal for free-hand embroidery, quilting, and creating attractive lace and monograms. Compatible with the following machines: 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/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