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 PL1500, PL2000, 925D, 929D, 1034D, and 1134DW. Also fits Husqvarna Viking overlocker models 660CD and 680CD. Please verify your model before purchasing. 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). EASY REPLACEMENT: Simple to install and use. Replacing worn or damaged blades ensures clean, smooth fabric cutting for optimal sewing results. PRODUCT DETAILS: - Product Type: Overlocker Upper and Lower Blade Set - Material: Metal - Application: Sewing and overlocking machines - Accessories: Cutting component for serger machines - 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 for best 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. 4. Colors may vary slightly due to monitor settings and lighting conditions. 5. If you have any questions, feel free to . Note: Due to differences in lighting and screen settings, the item's color may vary slightly from images. Slight dimensional differences may occur due to manual measurement.