The Filigrano Ball Tension Rod is a practical and delicate way to easily position your sheer curtains in the right light. Since it can be mounted without drilling or screws, it is ideal for rental apartments. To install, simply extend the tension rod to the desired length plus about 3 cm and then compress it to clamp the curtain rod into the window frame. For removal, just compress it again and take it out. Installation is also easily possible in slanted window frames.