It includes the 2607-20 M18 compact 1/2" Hammer drill/driver, 2656-20 M18 1/4" Hex impact driver, 2659-20 M18 1/2" Impact wrench, 2663-20 M18 1/2". The M18 cordless lithium-ion system features patented technologies and electronics, innovative motor design, and superior ergonomics provide the most efficient blend of power, weight and performance in the industry. Powered by Redlithium the M18 cordless system delivers more torque, more power, and longer run-time than the competition.