Qualitative Materials---This shower curtain rod is made of high quality carbon steel and rubber materials and with electrostatic sprayed surface, which is anti-rust, smooth and exquisite. Built-in Strong Spring---This shower curtain rod built-in strong spring, has excellent elasticity, can offers enough tension to support the rod firmly. Anti-slip Rubber Design---Both ends of this shower curtain rod has an anti-slip rubber, which can increase the friction between rod and wall, make the rod tight and not easy to fall off. Easy to Install---This shower curtain rod is very easy to install and disassembly, you don't need any tools, and it does not cause any damage to wall or closet. Custom Fits to Your Space---This extendable rod fits space with more sizes at certain range (30-50cm / 11.81-19.69in), hence it reduces the limit of application.