Review on Cutting Replacement Blades Mandrel Drills by Issac Smart

I bought this for a project I wanted to work on. I was planning on using them to make some simple cuts on very thin aluminum. I was able to easily install them on my cutting tool, although they don't tighten very well. I got about 2" in a 16" cut (again we're talking maybe 8-10 gauge aluminum with holes so it's very easy to cut through) and the blades were dulling which required a bit more pressure. With a little effort the pin holding the blade broke through and now I have all the blades (poor quality) and I have nothing to use them with. I suppose if you cut aluminum foil or maybe 6 gauge metal maybe that would work? But with such a thickness, you could just use a fingernail. I would definitely not buy again.