constructed with two needles on a cross bar from a single shaft. can be used with zig zag sewing machines that thread front to back. sews two rows of stitching at the same time. one (1) needle per pack.available sizes: • 1.6/70 • 1.6/80 • 2.0/80 • 2.5/80 • 3.0/90 • 4.0/80 • 4.0/90 • 4.0/100 • assorted: 1.6/70, 2.0/80, 3.0/90 alternate part numbers: 131096121, x57521001 *in order to use a twin needle, your machine must have a front or top loading bobbin, a zig zag stitch and the flat side of the needle shank faces the back of your machine.
