Schmetz domestic STRETCH sewing machine needles. Designed with a medium ball point and a specially designed eye & scarf area to prevent skip stitches with highly elastic materials. Should be used with elastic type fabrics or elastic knitwear. They have the standard domestic needle fitting having one flat side at the shank (Top) of the needle and are manufactured in two sizes 75nm (0.75mm thickness) and 90nm (0.90mm thickness). Schmetz always stamp the needle size on the shank of every needle they manufacture.