Description These needles employ two needles on a cross-bar from a single shaft. They can be used with zigzag sewing machines that thread from front to back. They sew 2 lines of stitching at the same time to multiply the beauty of decorative stitching. Features - Color: Blue.- Material: Metal.- Size: About 3.9x0.3x0.3cm.- This set includes 2mm sewing needles, 3mm sewing needles, 4mm sewing needles.- These machine twin needles are made of good quality material, they are durable and sturdy for a long lifetime.- These twin needles function as good accessories for sewing machines, compatible with most kinds of sewing machines.- Each double-needle fitted with 2 needles can be easily threaded 2 same or different decorative lines to simultaneously stitch in a straight or pattern way.- Portable and durable, easy to use and storage.- Suitable for home or clothing store use.Packing list: 12 x sewing needle