# 2 - Brother EF4-N21 Twin Needle Overlock:
The Brother EF4-N21 twin needle overlock is used to serge over the edge of one to two pieces of cloth for edging, hemming, or seaming. The machine has a small blade that cuts the edging before the machine loops are fed by multiple thread cones rather than a bobbin.
The Brother EF4-N21 is set for woven fabrics. We only keep black and white thread on hand, so you will want to bring your own matching thread cone(s).