Unfortunately, we must return this order. While measuring our windows very carefully, we did not discover that windows must be two inches deep to accomodate the mounting brackets. I tried to set up a way to install using a washer, but it stopped the blinds from clicking into place. Absolutely NO success contacting the manufacturer nor the retailer (no email or phone # on the web site). Delivery was great and product looks grewat, but it cannot be used in our windows.