EASY TO INSTALL AND REMOVE: The shower curtain hook is easy to open and close, no tools required, and slides easily through shower curtain holes and rods. Good quality: The curtain rings are made of metal, sturdy and durable, 40 pieces suitable for replacement HOOK INSTALLATION: The curtain hooks come with quick-release fittings that snap securely into place after installation to ensure your items stay hidden. Versatile: The shower curtain rings fit standard rods and work with most shower curtains or curtain liners; can also hang other small items; Ring Hook Size: The total size of the hook is about 6.8 x 3.5 cm, the thickness is 2 mm, comes with 40 pieces of curtain rings in total