I have found this product to be very beneficial. I used it to cut lots of holes in 3/8 aluminum panels. I ran some tests to determine the best combination of speed/pressure for the tool and material. Mocked my learning curve a bit but didn't hurt it either, so it's hard. Once I've determined the best speed and pressure for the drill, it cuts aluminum quickly, evenly, and cleanly. I have purchased several other sizes based on the specs of this first one.