The 2491-22 M12 cordless lithium-ion 2-tool Combo kit includes the 1/4 in. hex impact driver (2450-20) and the Hackzall reciprocating saw (2420-20). 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 lithium-ion, the M12 cordless lithium-ion system offers unmatched power, speed, and tool belt portability.