Serger Pepper // Flatlocking made easy, using a domestic overlocker. Flatlock seams’ most noticeable quality is that they have almost no bulk. You can see them in stretch sportswear, where s.a. in the inside of the garment may hurt athlete’s skin. With this kind of join, there are no seam allowances hanging around, they’re all wrapped inside the seam, with raw edges side by side. Learn how to set your machine and add this kind of seams to any of your creations, following this easy tutorial.