The 2691 - 22 M18™ Cordless Lithium-Ion 2-Tool Combo Kit Includes The Compact Driver (2601-20) and The 1/4 In. Hex Impact Driver (2650-20). 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.