The advanced 8-thread Evolution serger brings you the latest evolution in threading technology with ExtraordinAir™ threading. With just one push of a button, ExtraordinAir takes your thread through all three loopers at once, instantly, with a gust of air. Plus, you can thread the Evolution in any order. Eliminate tensions and puckering with the patented Automatic Thread Delivery System™. Combine chain and overlock stitches to form up to 8-thread stitches.