The (2799-22CX) M18™ 2-tool combo kit includes the 1/2 In. compact brushless hammer drill driver (2702-20) and the 1/4 In. hex brushless impact driver (2750-20). The M18™ cordless system's patented technologies and electronics, innovative motor design, and superior ergonomics provide the most efficient blend of power, weight and performance in the industry. The M18™ 1/2 In. compact brushless hammer drill/driver is the most compact 18 V drill on the market and delivers over 50% more run-time than drills with brushed motors. The M18™ 1/4 In. hex brushless impact driver is the most compact impact driver in its class and delivers over 50% more run-time than impact drivers with brushed motors. Both tools feature Milwaukee® built brushless motors, relink™ electronics, and REDLITHIUM™ batteries that provide more efficient power delivery, for fewer trips to the charger.