... 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 embroidery.Specification Needle: 11#--18#Straight stitch: 3.6mmPresser ... 8.6kgs, N/W 7.8kgs Zig-zag Sewing machine ROSA