Our 10-piece set of petal nut expansion screws is great for securing hollow doors, metal sheets, and other hollow structures. The unique design ensures a strong and reliable hold. To install, drill a hole, insert the petal nut, and tighten the screw. The expanding petals provide a secure grip within the hollow space, making these fasteners ideal for a wide range of applications, from home improvement projects to professional installations. Features -Color:Silver -Material:Iron -Size:2.80X1.20X1.20cm/1.10X0.47X0.47in -Distinctive design: the airplanestyle petal lantern design stands out for its uniqueness and style, making your projects look exceptional. - strength: constructed with czech hollow rivet screws, these fasteners are incredibly strong and durable. -Simple installation: the petal nuts are designed for easy installation and removal, making your tasks simpler and quicker. -Generous pack: the 10pcs pack ensures you have a sufficient number of fasteners for various needs, offering great convenience. -Versatile applications: ideal for a wide range of uses, including home decoration and diy projects, these fasteners are highly versatile. Package list: expansion petal screws