Overcast represents a sewing technique which involves making small zigzag stitches in order to securely fasten two cloth pieces together. This technique gives resilience and stops the material from coming
apart. The sew together may be used for a range of stitching projects, including hemming, stitching appliques, or
even creating blankets. It provides a neat and expert look to the finished product.
whipstitch WordReferencecom Dictionary of English