KLASSE twin universal machine needles let you sew two parallel rows at once for hems, pintucks, and decorative finishing on a sewing machine. This needle is size 100/16 with 6 mm (approx 15/64 in) spacing, giving you an easy way to create a professional double-row effect without specialized equipment. Select twin needles for edge finishes and accents, and follow your machine instructions for twin-needle threading and stitch selection.