EASY TO USE -- Stretch twin needle makes two rows of stitches at the same time, so the workload is reduced. It is suitable for knitted fabrics, denim, ultra sued, etc. MULTIPLE SIZES -- A total of 3pcs double twin needles, 3 different sizes, 2.0 / 90, 3.0 / 90, (These size fit for decorative open lines, thick material decoration); 4.0 / 90 (Fit for elastic fabric). WIDE APPLICATION -- These twin needles function as good accessories for sewing machines, compatible with most kinds of sewing machines. DELICATE DESIGN -- 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. DURABLE MATERIAL -- Made of stainless steel and plastic with good quality, they are durable and sturdy for a long lifetime.