Features: Versatile and Reliable: The expansion screw petal nut is suitable for various materials including hollow wall iron plastic and thin metal making it a versatile and reliable fixing tool. Superior Bearing Capacity: The petal nuts are made from durable carbon steel material providing excellent hardness and toughness for a safe and secure fixing solution with outstanding bearing capacity. Long-lasting Durability: Crafted from good-quality carbon steel these petal nuts are built to last offering exceptional durability that withstands the test of time and provides a reliable fixing solution. Quick and Efficient: The expansion screw petal nut allows for quick and efficient installation saving you valuable time and effort while providing a secure fixing solution for your projects. Reliable Performance: Rest assured that these petal nuts deliver reliable performance offering a dependable fixing solution that you can trust for all your projects whether big or small. Specifications: Material:Carbon Steel Surface Treatment: Galvanized Notes: Please allow slightly errors due to manual measurement and different monitors. includes: Choice 1: 50pcs*Petal Nut OR Choice 2: 100pcs*Petal Nut