The M12 FUEL™ HACKZALL® is the fastest cutting and most powerful saw in its class, delivering over 4X more run-time, up to 70% faster cutting and up to 6X longer tool life than competitive saws. The compact, one-handed design provides superior control and the ability to make cuts in tight spaces. Its' light weight design is optimal for overhead cutting applications. The POWERSTATE™ brushless motor outperforms all leading competitors with constant power output, yet runs cooler with no wearable components. REDLINK PLUS™ Intelligence ensures optimized performance and protects your investment from overload, overheating and over-discharge. The M12™ REDLITHIUM™ XC4.0 battery pack provides more work per charge and more work over the life of the pack than competitive batteries. The dual gear counter balance mechanism significantly reduces vibration, providing faster starts in metal and reduced user fatigue. One-handed design provides superior control and versatility over a standard recip saw Brushless motor supplies constant power for faster cuts and reduced heat for extended life Compact size allows for cutting in tight spaces and light weight makes overhead work easier Intelligence provides optimized performance and overload protection using total system communication between tool, battery and charger