2-speed 1/2-Inch Hammer Driver-Drill (0-400/0-1, 500 RPM) with Makita-built 4-pole motor delivers 450-Inch Pounds of Max Torque and weighs only 4.2 lbs Variable speed Impact Driver (0-2, 300 RPM) provides 1, 330 in.lbs. of Max Torque in a compact design and weighs only 3.4 lb High power motor for maximum cutting efficiency Large lock-off safety lever prevents accidental start up.