Klein's Compact Impact Driver for professional impact fastening and drilling applications offers 210 ft-lbs of max torque to get the job done fast. Engineered and designed by Klein Tools in the USA, the impact function makes this tool particularly useful for driving fasteners in wood, metal and concrete. The variable speed trigger provides better control. Users can change driving bits quickly with the 1/4-Inch quick connect chuck. Powered by 20V lithium-ion DeWALT batteries (sold separately).