The "A" in this Buttonhole Foot stands for automatic sewing of the buttonhole. You can use this foot on Bernina machines that have a maximum stitch width of 5.5mm and a variable buttonhole length of up to 30mm. You can sew buttonholes with or without cording. The sensor can measure the buttonholes automatically based on the size of the desired button. This allows you to produce any number of buttonholes of the exact same length. Use together with the fabric-feeding aid or the buttonhole leveler as well as the buttonhole cutter and button-sew-on foot to create perfect buttonholes with consummate ease.

Guaranteed to fit Bernina sewing machine models:
135 Activa, 145 Activa, 150 Virtuosa, 335, Activa 130, Activa 135S, Activa 140, Activa 145S, Activa 230, Activa 230PE, Activa 240, Artista 165, Artista 170, Artista 180, Artista 185, Artista 200, Artista 630, Artista 640, Artista 730, Aurora 430, Aurora 435, Aurora 440QE, Aurora 450, B325, B330, B335, B350PE, B380, B435, B475QE, B480, B485, B530, B535, B540, B550 Quilters Edition, B555, B560, B570 Quilters Edition, B580, B590, B710, B720, B735, B740, B750 Quilters Edition, B770 Quilters Edition, B770QE Plus, B770QE Pro, B780, B790, B790 Plus, B790 Pro, B820 Quilters Edition, B830, B880, B880 Plus, B990, Virtuosa 153, Virtuosa 153QE, Virtuosa 155, Virtuosa 160, Virtuosa 163

Alternate Part Numbers: 0312507101