An overlocker knife is a component of an overlocker machine (also known as a serger) that is responsible for trimming the fabric as it is fed through the machine.
The overlocker knife is a small, sharp blade that is located next to the loopers and needles in the overlocker's stitch formation mechanism. As the fabric is fed through the machine, the overlocker knife trims the edge of the fabric to create a clean, even edge, while the loopers and needles create the stitch.
