705SZWIB1CX4/75 SCHMETZ STRETCH TWIN 4MM SIZE 75 CARDED
Twin needles are actually two needles mounted on one shaft and are used to create two rows of stitches at the same time. When using a double needle, two spools of thread will be used in the top of the machine. Pass the thread from each one on a different side of the tension discs and thread one into each needle. Only one bobbin thread will be used and the stitches will create a double "web" of stitches on the back of the work.
The package of needles will show two numbers. One is the needle size; the other is the distance between the two needles.
Your machine should have a zigzag capability (with transversal hook) and a needle plate that has a hole wide enough for the needle. If you have different needle plates, use the zigzag stitch needle plate. Make sure to use also a zigzag foot with wide hole and not a straight stitch foot.