The M12 Cable Cutter is the strongest clipper of its size. At seven pounds and 10 inches, the tool can cut copper wire of up to an inch thick. A battery-powered ratchet in the head spins to apply 5,000 pounds of force. Milwaukee Tool M12 600 MCM Cable Cutter$429
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.