Versatile Compatibility Designed specifically for GN12 816 overlock hines, our upper and lower knives are for a variety of serger , making them a highly versatile accessory for both home and professional sewing s. Ensure seaml and compatibility with your existing equipment. PrecisionCrafted for Each is meticulously fted with rounded s and burr s, owing you to handle the s safely without the of injury. This thoughtful design ensures that you can on your sewing projects with confidence and comfort. Steel truction Our sewing hine knives are made om premium steel, engineered for al strength and ility. With nt wear ance and scratch ance, these s prom lasting performance, providing you with tools for your sewing needs. Enhance Your Sewing Efficiency Experience a signific boost in your sewing productivity with our s, which facilitate a of professional sewing techniques. By improving the ting quality and speed of your hine, these knives he you save valuable time du your sewing projects, owing you to create more in l time. UserFriendly Installation Designed for easy installation, our upper and lower knives can be quickly fitted onto your serger hine. You can effortlessly complete the installation proc without the need for tools, making it convenient for sewers of l s to upgrade their hine in a snap.