On its own, the human body stands zero chance against concrete or lumber. Armed with a sturdy tool, though, we can smash foundations and tear down walls. But don't be hasty: Picking the wrong implement will supercharge your frustration. Wielding the right one, however, will amplify the power in your physique. These three are ideal choices for grunt-inducing jobs. Best of all, they don't need plugs or batteries—just muscles.