POWERSTATE brushless motor supplies constant power for faster cuts and reduced heat for extended life. One-handed design provides superior control and versatility over a standard reciprocating saw. The dual gear counterbalance mechanism significantly reduces vibration， providing faster starts in metal and reduces user fatigue. The compact size allows for cutting in tight spaces， and it's light weight makes overhead work easier. QUIK-LOK Universal keyless blade clamp. REDLINK PLUS intelligence provides optimized performance and overload protection using total system communication between tool， battery and charger. REDLITHIUM XC 4.0 battery pack provides superior pack construction， more work per charge and more work over the life of the pack. Includes M12 FUEL Hackzall reciprocating saw， M12 REDLITHIUM XC 4.0 Ah extended capacity battery pack， M12 lithium-ion battery charger， multi-material blade， contractor bag.