An overlock machine is a specialized sewing machine designed to sew over the edges of fabric to prevent fraying and create a clean finish. It uses multiple threads and a looped stitch to secure the fabric edges, making it ideal for knit and stretch fabrics. Overlock machines are commonly used in garment manufacturing and home sewing for hems, seams, and decorative finishes. These machines can also trim excess fabric while sewing, which helps save time and ensures a professional look. Many overlock machines come with various stitch options, allowing users to customize their sewing projects. They are essential tools for anyone looking to achieve high-quality results in sewing.