Floriani Twin Universal Needle 6/100 #9455 You will love using the best needles in the world, brought to you by the company you have come to respect for their superior quality in every product wearing the Floriani Brand Name. Twin or Double needles are actually two needles mounted on one shank used to create two rows of stitches simultaneously–Ideal for creating hems and unique top-stitching. When using a double needle, two spools of thread will be used in the top of the machine. Pass the thread from each one on a different side of the tension discs and thread into each needle. Only one bobbin thread will be used and the stitches will create a double “web” of stitches on the back of the work. Most Important! Remember the needles must fit through the hole in the stitch plate - a straight plate cannot be used. Carefully hand turn the needle through the stitch movements before actually trying it on the project to assure that the throat plate opening will accommodate the needle and the design!