The most compact hammer drill/driver in its class is up to 20 percent faster in concrete than the competition. Built with a Milwaukee 4-Pole Frameless Motor, this M18TM cordless lithium-ion 1/2" hammer drill/driver delivers best-in-class 550 in-lbs of peak torque with the XC Extended Capacity REDLITHIUM Battery (sold separately). A variable-speed trigger provides speed control between 0-1,700 RPM on high speed and 0-550 RPM on low, with 0-29,000 BPM. This maneuverable, ergonomic hammer drill/driver is the only one in its class with an all-metal gear case for maximum durability, even on the most challenging worksites. Use with the REDLITHIUM Compact or Extended Capacity Battery Pack for more work per charge and more work over pack life than the competitors.