When it comes to power, speed and portability in a smaller package, nothing beats the new M12 system of cordless tools from Milwaukee Tool. This innovative system of cordless tools are precisely scaled to deliver the power, speed or torque required for professional applications, and they fit easily into the tool pouch. All M12 tools are powered by 12V LITHIUM-ION batteries which offer longer run-time, weigh less, and are environmentally friendly. More portable, more productive and more power. The new M12 system. Nothing But Heavy Duty.