Though some older machines use a chain stitch, the basic stitch of a modern sewing machine consists of two threads and is known as lockstitch. Industrial machines are usually specialized for a specific task, and so different machines may produce a different type of stitch. Modern sewing machines are designed in such a way that the fabric easily glides in and out of the machine without the hassle of needles and thimbles and other such tools used in hand sewing, automating the process of stitching and saving time.