Schmetz - Twin Needle #1716 - 2mm. Double needles are actually two needles mounted on one shaft used to create two rows of stitches simultaneiously. Use two spools of thread and one bobbin thread. Create pintucks and embellish your sewing, quilting and heirloom projects with Schmetz Twin Needles (double needle). For use in home sewing machines that can do a zigzag or other decorative stitch. Schmetz #1716 - Twin Needle - 2mm. Contains 1 twin needle:130/705H ZWI 2,0/80. The spacing is 2mm between these size 80 needles.