Sports God Doorway Pull Up Bar Horizontal Bar MATERIAL:EVA foam handle, non-slip, attracts the perspiration to be good USE: Suit for the door which the width is around 32-51 inches (not work on glass doors) SAFE: Equipped with non-slip washer, increase friction, prevent shaking, bearing capacity is 330 lbs SIZE: Retractable, shortest length: 32 inches, Longest length: 51 inches. (Wall thickness: 2 MM) ( End diameter: 2 inches) MERIT: Do not need to punch holes in the wall, no damage the wall. But not recommend to use it on the wall with wallpaper, it maybe damage the wallpaper after long-time use