Overlocker and sewing blade replacement set Overlocker accessories: upper knife and lower knife. Uses professional technology to ensure longterm use and reliable performance. Overlocker machine blades: a quality substitute for old serger blades. Features fine craftsmanship and smooth polishing to deliver clean, precise cuts. Sewing machine blades: upper knife and lower knife. Replacing the upper and lower blades provides smooth, accurate fabric cutting and improved sewing results. Household overlocker upper and lower knife: upper knife and lower knife. Suitable for household use as well as professional and sewing work. Key benefits Improves cutting performance by providing sharp, polished blades Extends blade life to reduce replacement frequency Restores efficiency and quality for overlockers, sergers, and compatible sewing machines Versatile for home projects or professional work Use scenarios Replacing worn blades on an overlocker to restore clean seam finishes and prevent fabric fraying Upgrading an older serger by substituting the upper and lower blades to regain sharp, precise cutting Maintaining a home sewing setup or professional workshop with reliable blade replacements for routine projects Compatibility and function highlights Upper knife and lower knife replacements designed for overlockers and sergers Suitable substitute for old serger blades with improved craftsmanship and finish Applicable to sewing machines requiring upper and lower knife blades for smooth fabric cutting