The DeWalt DC920KA is an 18V Heavy-duty XRP Cordless Drill/Driver Kit. It has DeWalt built built high power, high efficiency motor which delivers 510 unit watts out of max power for superior performance in all drilling and fastening applications. Its XRP extended run-time batteries provide long run-time & battery life. It features patented 3-speed all-metal transmission matches the speed to the application for optimal performance. Heavy-duty 1/2 inch ratcheting chuck locks the sleeve to prevent bits from slipping and falling out.