Dewalt-built high power, high efficiency motor delivers 425 unit watts out of max power for superior performance. The 18V high performance battery pack provides longer run-time and battery life than 18V systems, and the patented 3-speed all-metal transmission matches the speed to the application for optimal performance. It has a heavy-duty 1/2-inch self-tightening chuck and enhanced durability and reliability to withstand the job-site environment and the most demanding applications. It also has an anti-slip comfort grip.