The 2691-22 M18™ Cordless 2-Tool Combo Kit includes the M18™ Compact Driver (2606-20) and the M18™ 1/4" Hex Impact Driver (2656-20). The M18™ Cordless LITHIUM-ION 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. Powered by RED LITHIUM™, the M18 cordless LITHIUM-ION system delivers more torque, more power, and longer run-time than the competition.