The Brother Elastic Foot for Serger is a genuine Brother accessory designed to attach and sew elastic or tape in one easy step with your overlock machine. It features an adjustable stitch width of up to 12mm, providing flexibility for different projects. The foot includes a channel that secures the elastic or twill tape to the fabric, eliminating the need for pins as you create a serged edge. It also gathers knits as the elastic is attached, making it perfect for adding elastic to garments or other projects.