Revitalize your Brother Overlock machine with this essential 4-piece serger blade set. Crafted to match OEM specifications, these precision stainless steel knives (compatible with models 925d, 929d, 935d, 1034d) serve as exact replacements for X77683001 and XB0563001 parts. The set includes both upper and lower blades, engineered with high-carbon steel that stays sharper longer, ensuring flawless fabric cuts and reduced thread jams. Installation is straightforward—simply remove old blades via accessible screws and secure the new ones in place. Ideal for sewers facing performance issues like frayed edges or skipped stitches, this kit restores cutting efficiency while protecting your machine from undue wear. Each blade undergoes strict quality control for consistent sharpness and durability. Transform your overlocking experience today and extend your serger's life with this professional-grade, cost-saving solution. Note: Verify model compatibility before purchase.