The Bosch HD19-2D 120 Volt 1/2 In. hammer drill features a 8.5 Amp motor for maximum performance and durability. The 360-degree torque control side handle has a built-in quick release depth guide and securely locks into the drill collar for control in heavy-duty drilling. You can select the high speed for concrete, or high torque for wood or metal drilling applications. The two-mode selector easily converts the tool from hammer drill mode to rotation only mode.