Sometimes, only real power will get the job done. If you’re tackling bulky old concrete or stubborn rocks, a manual hammer or lightweight electric won’t cut it. That’s where a serious machine like the BAUMR-AG 4 Stroke Petrol Jackhammer enters the frame—made for heavy work, minus the hassle of cords or a separate power pack. This review runs through what to expect, how to get the best out of it,…