Upper Blade for Singer Serger / Overlock (Ref. 68004332)

The upper movable knife is primarily responsible for cutting off excess fabric as the overlock stitch progresses. Working in conjunction with the lower blade, it ensures a clean and precise cut for a professional finish without frayed fabric.
Continuous wear and tear caused by friction against different fabrics makes the knife lose its sharpness and start to "chew" or snag the materials. Replacing the worn knife in a timely manner not only prevents uneven seams but also avoids damage to the fabric, thread, and machine.
(Original references: 68004332)