Brother ST4031HD Strong Tough Freearm Serger (PS3734T 1034D+T) 1234 PreThreaded, Ext Table, 3 Feet Reg, Blindhem, Gather. Roll Hem, Diff Feed, 1300SPM

3 or 4 thread capabilities This serger works with either 3 or 4 threads, for added flexibility. For example, you might use 4 threads with 2 needles for a strong overlock seam on high use items, and 3 threads with 1 needle for overlock stitching on knits, suits, blouses or slacks.