DEWALT built high torque motor delivers 500 in-lbs of maximum torque. XRP extended run-time batteries provide long run-time & battery life.Patented 3-speed transmission features a max 3rd speed at 2,000 rpm. Hammerdrill mode 34,000 bpm drills faster holes in masonry applications. 1/2 in. Metal ratcheting chuck with carbide jaws prevents bits from slipping. Superior ergonomics provides optimal balance, comfort and control.