Overlock VS Interlock sewing machine - difference between an overlock and an interlock sewing machine - 3 thread, 4 thread, and 5 thread - TOPEAGLE INTERNATIONAL LTD.
Overlocker for Beginners—The Essential Overlock Stitch - WeAllSew
How to Hand Sew an Overlock Stitch - YouTube
Overlocker for Beginners—The Essential Overlock Stitch - WeAllSew