A dual needle sewing machine is equipped with two needles that work simultaneously to create two parallel lines of stitching. This setup allows for decorative and functional sewing techniques that are difficult to achieve with a single needle. The dual needles are placed in a single needle bar, making it easy for sewers to switch between traditional and double stitching without any complex setup changes.

4. Finishing Edges Once your sewing is complete, take care to finish the edges neatly. You can burnish the edges with a tool or simply rub them with a little water and friction to smooth the surface, giving a professional finish to your project.

Lock sewing is utilized in various sectors of the textile industry. It is the most common method for creating seams in woven fabrics, making it ideal for garments, upholstery, and other textile products. Its robust nature allows it to hold up under stress, which is especially important in areas that require durability, such as the armholes of shirts or the seams of outdoor gear.

The name Zig Zag derives from the machine's ability to create zigzag stitches, a significant advancement over the traditional straight stitch. This feature allows for greater versatility in sewing applications. It enables sewists to finish edges neatly, preventing fraying, and it is particularly useful when working with stretchy fabrics. This capability is invaluable for making garments that require durability and flexibility, such as t-shirts, activewear, and swimwear.