The Milwaukee M18 FUEL™ HACKZALL™ 2719-21 is the most powerful and fastest cutting one-handed reciprocating saw. Utilizing a POWERSTATE™ Brushless Motor and a best in class 7/8” stroke length, the M18 FUEL™ HACKZALL™ cuts 50% faster than competitors. The compact one-handed design provides superior control and ability to cut in confined spaces. The dual gear counter balance mechanism reduces vibration by 4X than traditional reciprocating saws, resulting in faster cut-starts in metal and reduced user fatigue. REDLINK PLUS™ Intelligence ensures optimized performance and protects your investment from overload, overheating, and over-discharge. The M18™ XC5.0 REDLITHIUM™ Battery provides more work per charge and more work over the life of the battery than competitive batteries. A rubber seal and weep holes provide superior protection against water and debris.