Patchwork,  1/4'' seam allowance foot is an excellent sewing foot for any quilting project. A straight stitch foot, but will allow small zig-zag stitching. This foot has markings on the toes helpful in matching corners. The build in guide is great for top stitching also. This is an aftermarket accessory that is not made by Bernina, and is very good quality. Good product for the right price. Please  make sure that your machine is the right type for this particular foot.   Fits the following models of Bernina 1530 & 1630 1200 Series models..... 1230, 1260 1100 Series models..... 1120, 1130 1000 Series models..... 1000, 1001, 1004, 1005, 1006, 1008, 1010, 1011, 1020, 1030, 1031, 1080, 1090 900 Series models..... 900, 900E, 910, 910N, 930, 931, 932, 940, 950 800 Series models..... 800, 801, 801s, 802, 802s, 803, 803s, 807, 808, 809, 810, 811, 811s, 817, 818, 819, 830, 830e, 830H, 831, 832, 840, 841, 842, 850 700 Series models..... 700, 707, 708, 709, 717, 718, 719, 730, 731, 732, 741, 742, 744 600 Series models..... 600(not deco), 610, 614, 640-2, 642-2, 644 500 Series models..... 530, 530-2, 531, 532, 532-2, 534, 540, 540-2, 542-2 Thank you