The formation of a stitch begins when the needle penetrates the fabric and descends to its lowest point. The bobbin hook then slides by the needles scarf, catching the upper thread, and carries it around the bobbin and bobbin thread. The thread is then pulled up into the fabric and completing the stitch. Sewing machine manufacturers want their machines to consistently produce a perfect stitch, so the needle’s configuration is engineered to manage thread and fabric to reduce skipped stitches. Each needle type produces a stitch by sewing a uniquely designed groove, scarf, eye and/point to enable the needle and bobbin hook to meet perfectly.