DESC: Equipped with an automatic looper threader and built-in roll hemming and capable of differential feed to gather fabric for ruffles and reduce stretching when sewing knits, this 4/3/2 thread serger can perform numerous stitch functions while stitching, trimming, and overcasting in a single operation. It's simple to operate, fast (up to 1,300 stitches per minute), and uses standard sewing-machine needles. An electronic foot pedal permits smooth speed control, ensuring full needle penetration even at lowest speeds. Stitch functions available include 3-thread and 4-thread overlocks.