EASY INSTALLATION MUST HAVE WOOD TRIM. All you need is a hammer, the included left corner bracket and right corner bracket, and windows with a depth of at least inch. Then just place bracket, tap in, and hang curtains. Its as speedy as that! STURDY AND DURABLE These heavy duty rack holders support up to 20 pounds, making them safe for heavy drapes and in homes with kids, families, and pets. They go up and stay up without a hitch! ZERO DAMAGE Enjoy this window aligning collection that is ideal for renters, frequent movers, or anyone who doesnt like wall damage. Universal size - The bracket can accommodate curtain rods from 3/4 inch to 1 inch in diameter.The screws provided will hold the rods in place and prevent it from spinning or turning.These can be loosened or tightened depending on the size of the rod. Easy Installation - These brackets comes with matching screws and anchors provide everything you need to install a lasting and durable fixture for your walls and windows.Everything needed was in the package,so you can install them easily.