Sewing buttonholes of different lengths. Gathering using thread or elastic thread (smocking). With or without cording. For 9 mm machines.
Compatible with: B 570 QE/QEE, B 590, B 710, B 740, B 750 QE, B 770 QE/QEE, B 790, B 790 PLUS, B 780, B 830, B 880, B 880 PLUS
