This lightweight, versatile hammer drill/driver offers up to 10X longer motor life, 2X more runtime and 25% more power for maximum performance on the jobsite. The POWERSTATE™ Brushless Motor outperforms all leading competitors with constant power output, yet runs cooler with no wearable components. The REDLITHIUM™ Extended Capacity Battery Pack delivers more work per charge and more work over pack life than the competitors. The onboard fuel gauge helps you monitor the charge more accurately, so there's less downtime on the job. REDLINK PLUS™ intelligence ensures maximum performance and protection from overload, overheating and over-discharge. The M18 FUEL™ Hammer Drill/Driver's all-metal ratcheting locking chuck provides maximum grip, bit retention and durability. The hammer drill/driver features 31450 bpm for fast hammer drilling through masonry. A new contoured soft grip gives you ultimate comfort during prolonged use.