This set of two Over the Window Curtain Bracket is entirely appropriate to hold your net curtain rods safely. With an opening of 0.38", you have to insert the white over the door bracket on the top of your window frame and then to slide on it one of the two clip-on hooks supplied. This set features a choice of two pairs of clip-on-hooks, one pair for flat sash rods and the other pair for café curtain rod diameter 0.5". The white bracket can also be fixed on each side if you have a one window sash. You don't need to drill or damage your window frame anymore. Plus, you have a choice of two different heights when installing your clip-on hooks on the support, like this, you can change the height of your sash rod easily. These plastic curtain brackets are suitable for all types of PVC, aluminum and wooden windows and compatible with all small curtain rods. Curtain rod brackets are good for hanging curtains, valances, nets, tiers or sheers. No rods included.