A serger trims and overlocks seam allowances simultaneously, creating a professional, finished edge that prevents fraying. This specialized machine uses multiple threads to interlock and wrap around the fabric edge, producing a stitch that is both durable and flexible. Imagine the neat, tightly bound edges found on most commercially produced clothing; this is often the work of a serger. They are especially useful for fabrics prone to unraveling, such as knits and sheers.
This rapid seam finishing significantly speeds up the garment construction process. The overlock stitch also offers greater elasticity than conventional seams, making it ideal for stretchy fabrics. Historically, sergers were primarily utilized in industrial settings. However, their efficiency and professional results have led to increased popularity for home sewing, offering a marked improvement over traditional zig-zag or overcasting stitches for seam finishing.