Sewing enthusiasts and professionals, this LNKA screw set is exactly what you need to keep your machines running smoothly! You get 2 needle clamp screws and 2 presser foot screws - the most commonly used screws for attaching needles to the needle bar and securing presser feet. These are specifically designed for Juki single needle industrial sewing machines like the DDL-127, DDL-227, DDL-500, DDL-501, DDL-552, DDL-553, DDL-555, DDL-5550, DDL-5600, DDL-8300, DDL-8500, DDL-8700, and DDL-9000 models. But here's the cool part - they also fit most other sewing machines including SINGER, BERNINA, PFAFF, JANOME, KENMOER, VIKING HUSQVARNA, BABY LOCK, and even work with vintage SINGER sewing machine face plates and back plates. Installation is super simple - you can use your hand to remove and replace the feet without any special tools. The quality is solid - these aren't cheap, stripped-easy screws but properly manufactured replacements that hold securely. If you've ever had a screw strip or go missing during maintenance, you know how frustrating that can be. Having these essential screws on hand means less downtime and more sewing time. They're that perfect backup set every serious sewer should have in their toolkit. Whether you're running a professional shop or maintaining your home machines, these reliable screws ensure your equipment stays in top working condition. The value is fantastic for four essential screws that could save you from major headaches down the road.