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: Designed to fit Brother Serger models 929D, 1034D, 1134DW, PL1500, and PL2000. Also compatible with Husqvarna Viking 660CD and 680CD overlocker models. Please verify your model before purchase. PERFECT SIZE: Upper blade measures 38 x 13 mm (1.49 x 0.51 inches). Lower blade measures 41 x 8 mm (1.61 x 0.31 inches). REPLACEMENT ACCESSORIES: Easy to install and use. Replacing worn upper and lower blades helps ensure smooth, clean fabric cutting, making them ideal replacements for old or damaged blades. PRODUCT SPECIFICATIONS: Product Type: Overlock Machine Upper and Lower Blade Set Material: Metal Application: Sewing and overlocking machines Use: Cutting component accessory Model Numbers: Upper Blade XB0563-001, Lower Blade X77683001 PACKAGE INCLUDES: 1 x Upper overedge knife 1 x Lower overedge knife WARNINGS: 1. Blades will naturally dull over time. Replace regularly to maintain optimal cutting performance. 2. Blades are sharp and lightweight. Handle with care to avoid injury and keep out of reach of children. 3. Dimensions are manually measured. Slight variations of up to 2mm may occur due to measurement methods. 4. Color representation may vary slightly due to differences in monitor settings and lighting conditions. 5. If you have any questions, feel free to for assistance. Note: Due to lighting and screen setting differences, the item's color may vary slightly from the images. Slight dimensional differences may occur due to manual measurement.