Utilizing a powerstate brushless motor and a best-in-class 7/8 in. Stroke length, m18 fuel hackzall cuts up to 50% faster than competitors. Compact, 1-handed design provides superior control and ability to make cuts in tight spaces. Dual-gear counterbalance mechanism provides lowest in-cut vibration of any reciprocating saw, 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. M18 redlithium xc5.0 battery pack provides more work per charge and more work over life of pack than competitive batteries. A rubber seal and weep holes provide superior protection against water and debris. IncludesMilwaukee sawzall ax 5 tpi 9in.