The M18 FUEL 40mm SDS Max Rotary Hammer utilises proprietary M18 FUEL technology to drill as fast as a corded SDS Max rotary hammers, deliver corded durability, and provide up to 20 minutes of continuous chipping. POWERSTATE Brushless Motor delivers 6.1J of impact energy for the more demanding, heavy-duty applications including dry coring and medium duty chipping in both concrete block and reinforced concrete. Powered by the new M18 REDLITHIUM™ HIGH DEMAND 9.0Ah battery pack which delivers up to 5X more run-time, 35% more power and runs 60% cooler than previous models. It also includes REDLINK PLUS Intelligence, a superior electronic system, preventing damage to the tool and battery from overloading and overheating.The M18 FUEL the 40mm SDS Max Rotary Hammer is part of MILWAUKEE’s complete cordless rotary hammer solution, ranging from Compact SDS Plus to SDS Max, all powered by the M18 REDLITHIUM™ battery system.