4/3/2 Thread Serger. Sew, trim and overcast seams in one easy step. Differential Feed gathers or keeps from puckering A serger is a wonderful timesaverIn one step, a serger sews your seam, finishes the edge, and trims away any excess fabric. But it does so much more. It has stitch functions to do a rolled edge hem, flatlock seaming, gathering, and decorative chaining. You