M18 FUEL 1-1/8″ SDS Plus Rotary Hammer Kit. Powered by FUEL technology, the M18 FUELTM 1-1/8 SDS Plus Rotary Hammer delivers faster than corded speed, corded durability, and all day work on one charge. The Milwaukee POWERSTATE Brushless Motor Provides 3.3 ft-lbs of impact energy, 0-1,350 RPM, and 0-5,000 BPM. The Milwaukee REDLITHIUM XC5.0 Battery Packs provide all day work on one charge, 20% more power, and 2X more life than standard Lithium-Ion batteries. REDLINK PLUS? Intelligence integrates full-circle communication between tool, battery, and charger to protect from overloading, overheating, and over-discharging.