The DEWALT DCF961 High Torque Impact Wrench is ideal for heavy-duty fastening applications. Its efficient brushless motor delivers high performance, extends tool life and allows for much shorter design. After 4 seconds of impacting, the tool automatically provides an increase in power to aid in loosening stubborn fasteners. The 4 mode membrane switch allows for better application control. Precision wrench mode helps to prevent overtightening and fastener run-off. A variable trigger allows complete control over all applications. Its comfortable rubber XR grip and switch increase user comfort whilst providing maximum control. There is also a bright white LED with delay feature for improved visibility and functionality. You can also control the  brightness, so you can dim or turn off the light as you see fit. Specifications: Bit Holder: 1/2in Square Socket with Hog Ring.No Load Speed: 0-400/0-800/0-12,000/min.Impact Rate: 1,890/bpm.Max. Torque: 1,626Nm, Breakaway Torque: 2,37