The DEWALT DCF899P2 20V MAX* XR Brushless High Torque 1/2-in Impact Wrench Kit with Detent Anvil, 5.0Ah features a brushless motor which is designed to provide superior run-time, performance and durability. It has a heavy-duty impact mechanism with a max torque at 700-ft/lbs. for best-in-class torque with the most demanding applications, with a max breakaway torque at 1,000-ft/lbs. This tool features a 3-speed selector switch that allows for application specific torque/drive control. The detent pin offers strong socket retention so to help avoid dropping sockets in various construction situations.