I love this roller shade. I do think that the instructions could have been more helpful though. After some experimentation I found that a 1/8" drill bit was the right size for the pilot holes for an inside mount with a wooden window frame. Also, my first attempt at mounting them with the brackets facing out (inside mount) was a failure. I suggest that unless the shades are the exact width needed go with mounting the brackets from the top (inside) of the frame. That way I installed the first bracket slightly away from the side then put the roller shade and 2nd bracket in position and made a pencil mark where the 2nd bracket needed to be. So much easier.