Model No. 2719-21 M18 FUEL Hackzall is a fast cutting and powerful reciprocating saw. One-handed design and vibration reducing dual gear counterbalance mechanism provides smooth cut starts for superior control and versatility over standard reciprocating saws. Compact and lightweight design allows for easier cutting in tight spaces or overhead applications. 7/8 In. stroke length removes more material with each stroke resulting in the faster cuts. Pivoting shoe provides constant contact with the work piece resulting in smoother cuts with less bucking and vibration. The POWERSTATE brushless motor offers increased cutting speed and power through the toughest applications. REDLINK Plus intelligence provides optimized performance and overload protection using total system communication between tool， battery and charger. The M18 REDLITHIUM XC5.0 extended capacity battery pack， Model No. 48-11-1850， features superior pack construction， electronics， and performance to deliver more work per charge and more work over the life of the pack. Features onboard fuel gauge to display remaining run time， all-weather performance in extreme job site conditions， REDLINK intelligence for overload protection， and discharge protection to prevent cell damage. The M18 & M12 multi-voltage charger， Model No. 48-59-1812， offers single unit simplicity by quickly charging all M12 and M18 battery packs. This unit charges batteries sequentially， reducing time to manage charge cycles. The charger communicates directly with the battery pack to monitor cell voltage， temperature and charge status to ensure a full charge. Powers up Milwaukee compact batteries in 30 minutes and extended capacity batteries in 60 minutes.