Place the button in the backspace of the foot to automatically determine the buttonhole size and your sewing machine will automatically sew the corresponding buttonhole thanks to the buttonhole sensor.
將鈕釦放置於壓布腳後端，運用縫紉機開釦眼花樣，可自動開出符合扣子大小的釦眼。
適用機型：4100
直接安裝於壓布腳腳脛上
