The M18 Cordless LITHIUM-ION 1/2" Hammer Drill Driver not only delivers an industry leading compact and ergonomic design, but is up to 20% faster in concrete than the competition. In addition, the 2602-20 is the only hammer drill/ driver in its class with an all metal gear case, providing maximum durability for heavy duty applications. Built with a Milwaukee 4-pole motor, the 2602-22 delivers best in class 550 in-lbs of peak torque with the M18 XC High Capacity REDLITHIUM  Battery, while the 2602-22CT delivers 450 in-lbs of peak torque with the M18 Compact REDLITHIUM  Battery. A variable speed trigger provides speed control between 0-1,700 RPM (High Speed) & 0-450 RPM (Low Speed).