White Speedylock differential 1600 is an overlock machine that can stitch dependable seams on all kinds of fabric, both light and heavy, including cotton, wool, rayon, tricot, jersey, and knits. It can be used for a variety of sewing projects, from simple hems to more complex garments.

The machine features a differential feed mechanism that helps to prevent puckering and stretching of fabrics, making it ideal for sewing on delicate or stretchy materials. It also has a built-in rolled hem feature, which allows you to create a professional-looking rolled hem without having to purchase a separate attachment.