O-Design: O-design shower curtain rings fit most standard shower curtain rods, whether straight or curved. This design reduces friction and tearing without pulling and damaging the curtain. The surface of the shower curtain ring is smooth and burr-free, allowing it to glide easily and silently on the shower curtain rod. Versatile Use: The shower curtain rod rings are versatile and suitable for most curtain types, such as shower curtains, sheers, French curtains, etc. The tie-down rings are also suitable for storing memos, key chains, organizational tools, scrapbooking, photos, book sample holders, contract documents, or other suitable applications. Easy to Use: The shower curtain hooks are quick and easy to install. With the round metal shower curtain hooks, simply open the ring clips and then attach the rings to the curtain rod. The rust-resistant shower curtain rings close securely, ensuring the shower curtain hangs securely on the rod. The black shower curtain rings feature an