The tension rod is made of high-quality inner and outer carbon steel, sturdy and durable. Easy to install. Holds securely. No tools needed. Expands from 41" inches to 76" inches. Rod diameter is 1" inch. MATERIALS: The tension rod is made of high-quality inner and outer carbon steel, sturdy and durable. Easy to install. Holds securely. No tools needed. For bathroom use, for window use, for closet use. SUITABLE FOR: Ceramic Tile, Cement, Brick, Wallpaper, Diatom Mud, Wood, Tiles Wall, Glass Wall, Lime Wall, Tape Dry Wall, Rough Stone Wall. DIRECTIONS: STEP 1: Keep wall clean and dry. Roll out the rod. STEP 2: Measure desired width, unscrew approximately 1 inch. STEP 3: Place rod at desired height by compressing rod & release rod.