Item Type: Overlock Machine Upper Lower Knives Material: Steel Product Specification: 2 Pieces Product Use: Household Applicable Models: Old style for GN1 2, 81 6 Overlock Machine, etc. Upper Knives Size: Approx. 5.2 x 0.5cm / 2.0 x 0.2in Lower Knives Size: Approx. 5.5 x 0.5cm / 2.2 x 0.2in Package List 2 x Knives 1APPLICABLE MODELS: Overlock machine upper lower knives are suitable for for GN1 2 , 81 6 overlock machines etc. perfectly matched. 2INCREASE EFFICIENCY: Overlock machine knives create many professional sewing processes and save a lot of time, thus greatly improving efficiency. 3HIGH STRENGTH: Overlock machine knives are made of steel, high strength, durable and can be used for a long time. 4EASY TO INSTALL: Upper lower knives are easy to use and can be installed very quickly, saving time. 5REPLACEMENT: Replace broken, damaged, cracked or unusable lower knives, light weight, easy to store and carry