When we bought the blinds at the hardware store, we paid no attention to the brackets. At home then came the big shock. "Those things must indeed be drilled". But since we can not drill in the window still in the wall by the window according to the lease, I have ordered these brackets on Amazon. Ruckzuck they were already there and could be attached. Assembling the bracket was super easy. Then I have the blinds just clicked and they were wonderful. They have held the holders and let the blind swing back and forth. Nothing is (as discontinued in the old holder or dropped). So quickly ran to the window. A small screw, for the matching key was found in the package, you could tie up at the window, the holder also. By turning the screw, the bracket tightened. And already was the blinds on the window. On my old mount everything had to be pushed together and solved them again, so I had the blinds regularly on the desk. This holder I am sure that the blind stops and disappears by moving too easily back and can hang in the new window. Just a super great and convenient holder !!!