Milwaukee 2691-22 M18 Cordless LITHIUM-ION 2-Tool Combo Kit The 2691-22 M18 Cordless 2-Tool Combo Kit includes the M18 Compact Driver 2601-20 and the M18 1/4" Hex Impact Driver 2650-20. The M18 Cordless LITHIUM-ION Systems 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.