We have DEWALT DC901Kl 1/2-Inch 36-Volt Cordless Lithium-Ion Hammerdrill/Drill/Driver Kit with Product Detail DEWALT built high power, high efficiency motor delivers 750 unit watts out of max power for superior performance in all drilling and fastening applications DEWALT exclusive lithium ion cells offer long battery life and durability: 2,000 recharges Patented 3-speed all-metal transmission matches the speed to the application for optimal performance Heavy-duty 1/2-inch self-tightening chuck tightens throughout operation providing superior bit gripping strength Enhanced durability and reliability to withstand the jobsite environment and the most demanding applications; Anti-slip comfort grip provides increased comfort and control . The "DEWALT DC901Kl 1/2-Inch 36-Volt Cordless Lithium-Ion Hammerdrill/Drill/Driver Kit" is best product for you. We recommended DEWALT DC901Kl 1/2-Inch 36-Volt Cordless Lithium-Ion Hammerdrill/Drill/Driver Kit