lockstitch

A lockstitch is a common type of stitch used in sewing machines to join fabric pieces securely. It involves two threads: one from the top spool and one from a bobbin beneath. These threads interlock in the fabric, forming a strong, even stitch that holds the material together. The lockstitch provides durability and a neat appearance, making it ideal for most sewing tasks, from clothing to upholstery. It’s called a “lockstitch” because the interlocking threads “lock” the fabric pieces together, preventing them from unraveling.