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Jack industrial overlocking machines are available in a range of configurations designed to suit different fabrics and production needs, including 3-thread, 4-thread, 5-thread, and advanced 6-thread models. The popular E4 series offers high-speed performance with direct drive motors, making the machines energy-efficient, quiet, and smooth in operation, while built-in lubrication systems reduce wear and ensure durability. The 6-thread overlocker stands out for its versatility, as it can be configured to operate as a 3-, 4-, or 5-thread machine as well, allowing users to switch between different seam types and fabric categories without changing machines. These machines also feature adjustable speeds, differential feed for handling stretch and woven fabrics, and consistent stitch quality at high speeds, making them ideal for everything from lightweight garments to more structured production work. Overall, the range provides flexible, efficient solutions for both small workshops and larger manufacturing environments seeking professional finishes and improved productivity.