These hollow door anchors with screws are designed for easy and effective installation in hollow metal cavities. The petal nut expands within the cavity, providing a secure and stable hold. To use, drill a hole, insert the anchor, and tighten the screw until the petal nut expands. This ensures a firm grip, making it great for securing items to hollow doors and walls in various settings, including homes and RVs. Features -Color:Silver -Material:Iron -Size:2.80X1.20X1.20cm/1.10X0.47X0.47in -Elegant design: the airplanestyle petal lantern design is both unique and elegant, enhancing the aesthetic of your projects. -Robust construction: featuring czech hollow rivet screws, these fasteners are extremely durable and reliable. -Ease of use: the petal nuts are designed for straightforward installation and removal, making them very userfriendly. -Ample quantity: the 10pcs pack provides enough fasteners for various applications, ensuring you always have what you need. -Multifunctional: great for home decor, diy crafts, and more, these fasteners are versatile and suitable for many uses. Package list: 30 x expansion petal screws