Amazon.com Review
Delivering solid performance and serious convenience, DeWalt's heavy-duty, 18-volt, 1/2-inch drill/driver/hammer drill will do up to 2,000 rpm and 34,000 beats per minute, and can produce 450 inch-pounds of maximum sustained torque. The carbide-tipped chuck jaws have excellent bit grip. There's also an automatic spindle lock, as well as an antislip comfort grip. Essentially the same tool as DeWalt's T-grip DW988, this hammer drill comes with a pistol grip, which some users prefer because it makes it easy to put your full force directly behind the bit. A pistol grip, however, doesn't distribute weight as evenly as a T-grip, so it's not as comfortable to hold, especially over long periods of time.
--Jonathon Tudor
From the Manufacturer
DEWALT DW989K-2 18 Volt XRP 1/2-Inch Drill/Driver/Hammerdrill Kit