While single needle stitching is known for its strength and durability, it does require a certain level of skill and expertise to master. Sewers must have a steady hand and a keen eye for detail to create the precise stitches that are characteristic of this technique. They must also have a good understanding of fabric properties and thread tensions to ensure that the stitches are secure and even.

A specialized zigzag presser foot typically features a wide groove at the bottom. This groove allows the needle to move freely from side to side without obstruction when creating the zigzag pattern. Additionally, many zigzag presser feet have markings that guide seam allowances, making it easier for users to achieve precise stitching.

One of the primary benefits of using a double needle is its ability to create a parallel stitch effect, reminiscent of professional finishings often seen in ready-to-wear garments. This parallel stitching is not only aesthetic but also strengthens seams, making them more durable. This makes double needles particularly popular when working with knit fabrics, as they can help prevent the fabric from stretching or puckering during the sewing process.