Save over $400 on the DeWalt DCX4230 18-Volt Lithium-Ion Combo Kit which includes the DeWalt DC927 Hammer Drill and the DeWalt DC827 Impact Driver. The DeWalt DCX4230 combo kit combines two of the most commonly used tools powered by DeWalt's exclusive NANO battery technology.DC927 Hammer DrillThe DC927 18-volt cordless hammer drill features a high power motor capable of delivering 425 unit watts out of maximum power, making it easy to get drilling and fastening jobs done quickly and efficiently. The DC927 also offers the dependability of an all-metal transmission with three speeds for job-specific performance, along with a unique 1/2-inch chuck that tightens as you work to prevent bits from slipping.DC827 Impact DriverThe DC827 18-Volt delivers 1,330 in./lbs. of torque and 0-2,400 RPM performance for fast, effective tightening and loosening of fasteners. The DeWalt DC827 is also light and compact weighing only 3.7 pounds and measuring just 5-3/5" long. The DC827 also features an anti-slip rubber grip along with an ergonomic design making it comfortable to use anywhere. A built-in LED light and convenient bit storage provide additional convenience.