Inside the rod spring is after phosphating electroplating 't rust. Non-slip rubber on both ends, increase the and metope, make the rod more strong, not easy to fall off. Easy installation without any tools, no damage to walls or doors and . The adjustable telescopic range,portable, easy to use special. Put on a shower curtain can use directly, also can do curtain rod, also can get inside the shoe as the diaphragm.