In this one I got bored (in the best way) and decided to see what my hammer drills can really do with a stupid-long 18" bit and an absolute brick of a stump. On low, yeah, pretty much anything will chew through—but I wanted to know: can they do it on high? I ran them in drill mode and basically tried to send that bit straight down the middle. The log was still wet inside even after sitting around forever, and it had spots that felt like fatwood or something because it was even a pain to cut with a chainsaw. The big takeaway: Flex on turbo is just nuts. That extra RPM (turbo is around 2500 vs 2000-ish on the DeWalt) made a huge difference, and it flat-out ripped compared to the others. DeWalt still got it done with a 5Ah “stack pack,” and I’ll say it again—those packs make a game-changing difference on stuff like this. Hercules made it through too, but it stalled out and struggled more (I was running the 4.0 high output). I even messed around with a Black+Decker Matrix for fun, and with a smaller 11/16" bit it actually surprised me.