- Comprehensive Packing List: This set includes 40 expansion screws in four sizes: 10 M4, 10 M5, 10 M6, and 10 M8. This variety ensures you have the right size for any project. - Durable Construction: Crafted from high-quality carbon steel and galvanized for added protection, these jack nuts are rust-proof and corrosion-resistant. Their high hardness ensures they resist deformation and breakage, providing long-lasting reliability. - Precision Engineering: Each metal petal nut features accurate sizing and threading, ensuring a perfect fit for your holes and bolts. This precision enhances performance and stability. - User-Friendly Installation: Installing these petal-shaped metal nuts is straightforward. Simply insert the jack nut into the designated hole, then use a professional rivet tool to clamp the rivet nut, securing the screw and material firmly in place. - Versatile Applications: Ideal for a wide range of projects, these expansion screws are perfect for furniture assembly, automotive repairs, and construction tasks. Whether you're working on home improvement or industrial applications, these nuts provide the strength and stability you need. - Compatibility: Designed to work seamlessly with various materials, including wood, metal, and plastic, making them suitable for diverse applications. Experience the difference with our high-quality expansion screws, engineered for performance and durability in any project.