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. Expands from 42" inches to 72" 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.