I'm removing a retaining wall on my patio, we're saving the bricks for another project. I started with a masonry drill and a drill press but it's too slow. So I started using a chisel and it goes much faster, I lose about 10% of the stones and that's ok. My only problem is hitting my arm with a hammer drill. They don't do a full stroke so it doesn't hurt that much but after 5 or 6 times it does start to hurt. This fixes the problem.