The M18 FUEL 1-9/16 in. SDS-Max Rotary Hammer is the first to world 18-Volt SDS-Max cordless solution. By utilizing proprietary M18 and FUEL technologies, the 1-9/16 in. SDS-Max rotary hammer is able to drill as fast as a corded SDS-Max rotary hammers, deliver corded durability and provide over 20 minutes of continuous chipping. POWERSTATE Brushless Motor delivers 5 ft./lbs. of impact energy for the more demanding, heavy-duty applications. Including dry coring and medium duty chipping in both concrete block and reinforced concrete.