Ok, we're trying to hang blinds on windows on our new "fixer upper". These are outside mounts. I put the brackets up and balanced them and marked where I should drill holes with a pencil. Then, without the brackets up, I started to drill the hole, so that the screws would go in easier for putting the brackets in. But when I starting with the brackets, using a powerdrill, I'm at a point where I can't drill anymore, where the powerdrill doesn't seem powerful enough to finish drilling. The drill no longer catches in the screw and just twirls around, not screwing What do I do now? Important note (maybe): I'm drilling in the wood of the window frame, as the window frame is for two windows. So I be drilling in the wall or inside mount instead? Side, related questions: I was going to do an inside mount, but the windows width was 33', which I couldn't find in a premade size at Home Depot or Lowe's. I could find 31, 32, 34, & 35, but no 33in. Is this normal? I don't know what kids of wood the windows are. How can you tell different types of wood apart?