An overlock machine is a specialized sewing machine designed to sew over the edge of fabric, preventing it from fraying. It uses multiple threads to create a strong, stretchy seam, making it ideal for knit fabrics and finishing raw edges. Overlock machines are commonly used in garment production and home sewing for a professional finish. These machines can perform various functions, including trimming excess fabric while sewing, which helps save time and ensures a clean edge. Many overlock machines also offer different stitch options, allowing users to customize their sewing projects, whether for clothing or other fabric items.