It is three machines in one: an Overlock, Cover Hem, and Top Cover Hem. It is versatile, incorporating many flatlock, blanket and overlock stitches, as well as the chain and coverstitch. The 1200D automatically selects the tension settings for each stitch so you can sew with comfort and confidence. You'll also find 28 optional feet and attachments. With all this, you are only limited by your imagination.