Can't tell you how many drill bits I ruined trying to get through the lintel. I used a masonary drill to get through the stucco and a high speed drill to get through the lintel. I finally gave up and called a handyman to do the job. He took one look at what I wanted to do and declined the job because he would ruin too many bits. He suggested drilling above the lintel into the concrete block, but that wouldn't achieve what I wanted, so I did something else.
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