They do their job. Haven't tried them on heavier metal yet, but so far they're doing fine on everything else. Well, let's see how they hold up over time (I've only had them for a week and I've used 5 or 6 sizes of them so far). The included case is good (and it's a real case, not a rubber case). I don't expect machine quality at this price point but so far they seem to be as good as anything I would buy from Home Despot and pay extra for branding (for things that were probably made in China in the same factory as this one). ). , haha).