Comparison Between Chain Stitch and Lock Stitch

Chain Stitch:

The stitch which is formed by two or more sets of sewing thread (needle thread and looper thread) is called chain stitch. Here, threads are bound together by interlacing and looping. It should be noted here that, chain stitch strength is greater than lock stitch and back tacking is not needed at finishing side of stitch as security.

Lock Stitch:

The stitch which is formed by two sets of sewingthread (needle thread and bobbin thread) is called lock stitch. Back tacking is needed here as security at the starting and finishing side of stitch.