[campkep]

The building is concrete, cinder block, brick. Built in the 1920s. The windows are 54 1/4 inch wide and 80 or so inches tall. I've drilled through about 1/2 inch mortar and hit what must be a steel frame above and on both sides of this window. Even as far as 3 inches in from the glass. The windowsill is about 8 inches deep. I can't get a drill into this metal and there isn't enough mortar to hold a screw. Any ideas?
I've tried Titanium bits, self tapping screws, and can't seem to get anywhere! Please help! My only option seems to be building in a 1x1 wooden frame inside this window and mounting the blinds to it. What do you all think?

[hkstroud]

Try a cobalt bit, made for drilling hardend steel. Purchase several bits. The are quite brittle and break easily if too much pressure is applied. Slow speed.

[campkep]

Thanks for the "tip". I'll give it a "spin". Sorry for the pun, I couldn't pass it up.
I appreciate your suggestion! Someone from an un-named hardware store suggested a "Hinzer gun". I'm a little worried I might break out the window from the recoil.