HIGH QUALITY: Made of high-quality stainless steel, this blade set is strong, durable, and built to last. It offers excellent corrosion resistance with a smooth, burr-free finish for reliable performance. COMPATIBILITY: Compatible with Brother Serger models 929D, 1034D, 1134DW, PL1500, PL2000. Also compatible with Husqvarna Viking 660CD and 680CD overlocker models. Please verify your machine model before purchase. PERFECT SIZE: Upper blade dimensions (L x W): 38 x 13 mm / 1.49 x 0.51 inch. Lower blade dimensions (L x W): 41 x 8 mm / 1.61 x 0.31 inch. REPLACEMENT ACCESSORIES: Easy to install and use. Replacing worn upper and lower blades ensures smooth and clean fabric cutting, making it an ideal replacement for old or damaged blades. PRODUCT DETAILS: Product type: Overlocker upper and lower knife set. Material: Metal. Application: Sewing machines. Function: Cutting accessory for overlockers. Model numbers: Upper knife XB0563-001, Lower knife X77683001. PACKAGE INCLUDES: 1 x Upper overedge knife, 1 x Lower overedge knife. WARNINGS: Blade dullness may occur over time. Replace regularly to maintain optimal sewing performance. Blades are sharp. Handle with care to avoid injury and keep out of reach of children. Dimensions are manually measured. Slight variations of up to 2mm may occur due to measurement methods. Colors displayed may vary slightly due to differences in monitor settings and lighting conditions.