Jeans twin needle 4mm size 100 1pcs Schmetz Jeans 2-needle/twin needle is ideal for double-row seams on denim and similar heavy fabrics. The two needles mounted on one shaft create two rows of stitches simultaneously.Only for use on zig-zag machines.After use, it is recommended to store the needles in the box. The box protects the needles and provides a good overview of which needles and sizes you have. GBP 3.95 1