Note: This rod is 5/8" in diameter (the normal small tension rod is 4/8" in diameter),which is thicker and stronger bearing. Please confirm if it is suitable for your window frame. High-strength durable spring inside,can be used repeatedly,one rod can bear 6-10lbs,is 2 times than the ordinary product Long-lasting metal rod is made of quality carbon steel with non-slip flexible caps,corrosion-resistant and rust-proof,having longer service life Easy to install: just twist and pull,without tools,drilling,or damage Wide Usage: used as a curtain rod for window,doorway,wardrobe,bookcase,cupboard and shoe rack,towel bar etc..