The coverstitch is an unusual three- or four-thread stitch featured on some sergers and specialized machines. It's often used in ready-to-wear garment hems, particularly knits. On the right side, the stitch looks like double or triple rows of topstitching. On the wrong side is a continuous thread looping between the rows. To remove the stitches, pull the thread in the opposite direction from the way it was sewn.
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