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At its core, a serger machine is designed to finish the edges of fabric. It combines several functions—trimming, sewing, and overlocking—into one operation. Unlike a traditional sewing machine, which typically uses a single needle and one or two threads, a serger can use multiple threads (usually 3 or 4) to create a secure seam. This capability allows it to produce stitches that not only hold layers of fabric together but also prevent fraying and unraveling.

One of the key factors in using a handheld sewing machine on thick fabrics is the choice of needle and thread. For thick materials, a heavier needle is necessary; a denim or universal needle is typically recommended as they are built to penetrate multiple layers of fabric. Likewise, a strong thread, such as polyester or upholstery thread, ensures that the seams remain intact under stress. Investing in the right supplies upfront can make a significant difference in the outcome of your sewing projects.