Inside the rod spring is after phosphating electroplating 't rust. Easy installation without any tools, no damage to walls or doors and . Non-slip rubber on both ends, increase the and metope, make the rod more strong, not easy to fall off. 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.