... regulating knobWith accessory for sewing zipper, darning, buttonholing,buttonholing and sewing buttonSewing function: flat seam, blind sewing, zig-zag sewing, buttonholing, sewing button, sewing zipper, hemmed, overlock and ... : G/W 8.6kgs, N/W 7.8kgs Zig-zag Sewing machine ROSA