The Dual Feed Foot with changeable presser feet is designed to feed layers of fabric and/or batting evenly. It is perfect for quilting, sewing velvet, stretch fabrics, imitation leathers, and fabrics needing precise pattern matching. Snap on the Changeable Straight Stitch Foot. * Select the center needle straight stitch. Adjust it up to a maximum stitch length of 6. Snap on the Changeable Zig Zag Foot and select stitches up to a maximum of 7mm wide and 6mm long. * Fits Husqvarna Viking models Prelude (340, 350, 360, 370), Scandinavia (100, 200, 300, 400), Daisy (315, 325, 335), 330, 320, 310, 250, 230, 225, 215, 210, 205, Anna, Sarah, Platinum (955E, 950E, Plus, 775, 770, 755Q, 750Q, 735, 730, 715), Rose (600, 605), Lily (555, 550, 545, 540, 535, 530), 500, Interlude (445, 435), * Freesia (425, 415), 400, 350, Emerald (183, 203), Designer SE, Designer I, Designer II, Quilt Designer, Quilt Designer II, Sapphire (875Q, 870, 855, 850, 835, 830), Designer Topaz (20, 30), and Designer Diamond.