This product is a very practical supplement that help you hang your curtains without needing to placing holes. This product is called primed rosette corner blocks. When you need to install your curtains, you should have those products for a better installation.
Primed rosette corner blocks for curtain installation is not an expensive products and has an average price between 2 and 4 usd. You can buy this product on webshops or a hardware shop near your location. You will see that this product will satisfy you. For a better curtain installation, try this product.