Review on 🔧 Irwin Tools 3016021 Single High Speed: Precision, Durability, and Reliability Combined by Chris Goldsby

I bought four of these as I tend to drill a lot of a certain diameter holes. The first thing I used was drilling through nice soft 6061 aluminum. The piece was about 3/16" thick. The drill bit broke before it even got into the metal! And yes, I used lube and not too fast or drilled too deep.The second practice ended with no issues and ran about 40 more without incident.So it looks like they hit or miss.Quality control issue?I don't know until it finally wears out/brokes and I have to get the next one in the pack.