HIGH QUALITY: Made of high quality stainless steel, it is strong and durable and has a long service life. Corrosion resistance, smooth and burr-free, high strength and durability. COMPATIBILITY STRONG: Compatible with Brother Serger 929D, 1034D, 1134DW, PL1500, PL2000. Compatible with Husqvarna Viking 660CD and 680CD overlocker models. (Please see the model before purchasing.) PERFECT GIFT: This upper and lower blade is suitable as a gift for family and friends who love overlockers. tailors around you, or you can use it to sew exquisite craft supplies for people around you. PERFECT SIZE: upper blade size (L x W) 38 x 13 mm / 1 .49 x 0.51 inch, bottom blade size (L x W) 41 x 8 mm / 1.61 x 0.31 inch. REPLACEMENT ACCESSORIES: Easy to install and use, replacing upper and lower blade will ensure smooth and clean fabric cutting, perfect replacement for old or bad ones. Product Description Specification: Product alias: Overwrapper Upper and lower knife Size: upper knife: 3.8cm*1.3cm Cut: 4.1cm*0.8 cm Material: Metal Field of application: Sewing machine Accessory use: Accessories for cutting equipment Model : Upper knife XB0563-001 Lower knife X77683001 Fits: Brother Serger Models: PL1500, PL2000, 925D, 929D, 1034D, 1134DW. Fits: Husqvarna Viking Serger Machine Models : 660CD 680CD. Package including: 1 * Upper overedge knife 1 * Lower overedge knife Warning 1. The dullness of the knife cannot be avoided, change it regularly so that you can sew again. 2. Lightweight and sharp, be careful not to hurt your finger and keep it away from children. 3. About the size: the size is measured manually. Due to factors such as different measurement tools and methods, there will be an error of 2mm. It is recommended to shop by yourself. 4. About color: The products in our store are all taken in kind, and the colors are professionally proofread and are closest to the actual tiles, because the color contrast and color temperature of the computer monitor are different, etc. 5. If you have any questions, we are happy to help.