Twin or double needles are actually two needles mounted on one shaft and are used to create two rows of stitches at the same time. These needles come in a variety of needle types and sizes and are especially useful for decorative stitching and anywhere else that may require multiple, uniform stitching rows. A sewing machine with zigzag capabilities is required. Metallic point, size 80, with a total stitch width of 2.5mm. 1 per pack.