Note: In order to make the rod more solid, so that the interface threads fit very tightly. Before installation, please carefully check the step-by-step installation diagram or video at the top. If you still encounter problems during installation, please contact us via Amazon and we will help you. High-quality materials, sturdy and durable: Made of high-quality anti-rust material, corrosion-resistant and durable. Diameter: 22mm, larger and stronger to prevent bending and breaking. Thick spring to provide high-strength tension. Delicate anti-slip head at both ends, providing reliable anti-slip effect. No drilling required, easy to install. Versatility: Curtain rods can not only be used to hang curtains, thanks to their sturdy and retractable design, they can support a variety of items for most indoor scenarios, such as hanging door curtains, shower curtains, etc.