Backstitch

Backstitch or back stitch and its variants stem stitch, outline stitch and split stitch are a class of embroidery and sewing stitches in which individual stitches are made backward to the general direction of sewing. In embroidery, these stitches form lines and are most often used to outline shapes and to add fine detail to an embroidered picture. It is used as a hand-sewing utility stitch to attach definitively and strongly two pieces of fabric together. It is also used for writing.