The Milwaukee 2719-21 M18™ FUEL™ HACKZALL® is the fastest cutting and most powerful one-handed reciprocating saw. Utilizing a POWERSTATE™ Brushless Motor and a best in class 7/8" stroke length, the M18™ FUEL™ HACKZALL® cuts up to 50% faster than competitors. The compact, one-handed design provides superior control and the ability to make cuts in tight spaces.