Learn how to setup and take care of your new Serger. You will be taught how to make corners (inside and out) and overlock stitches. A serger and an overlocker are different names for the same machine. Americans generally refer to these as sergers, and nearly everyone else refers to them as overlockers. A serger performs an overlocking stitch, which is really more like knitting than sewing. Overlocking, or serging, trims and binds seams so that the fabric can not unravel.