The 2494 - 22 M12 cordless 2-tool Combo kit includes the M12 3/8 in. drill/driver and the M12 1/4 in. hex impact driver. The innovative M12 cordless lithium-ion system is designed to deliver the power and torque required for professional applications, in a size that reaches the tightest and toughest places. Powered by REDLITHIUM , the M12 cordless lithium-ion system offers unmatched power, speed, and tool belt portability.