Tools have been used since the beginning of man. The tools used today made Construction and repair work more efficient. Just look at the evolution of the drill. Once the drill had to be manually turned for the bit to drill a hole. Then corded drills made the task of drilling faster and easier. Today most power tools receive battery power. Wrenches once required manual turning also repositioning, ratchet removing fasteners. Electric meters went from analog to digital making more precise testing. Ratchets now have really fine teeth requiring less turning before the gears engage.