Brand: Milwaukee Tool Manufacturer's Part Number: 2957-20 Part Type: Impact Wrenches and Drivers Product Line: Milwaukee M18 FUEL 1/4 in. Hex Impact Drivers with ONE-KEY Summit Racing Part Number: MWT-2957-20 UPC: 45242637898 Impact Type: Electric Electric Impact Style: Cordless Electric Motor Type: Brushless Impact Drive Size: 1/4 in. Impact Maximum Tightening Torque Output (lbs./ft.): 167 lbs./ft. Maximum RPM: 3，900 Electric Impact Voltage: 18 V Lithium Ion Case Included: No Extra Battery Included: No Battery Charger Included: No Quantity: Sold individually. Milwaukee M18 FUEL 1/4 in. Hex Impact Drivers with ONE-KEY Milwaukee M18 FUEL 1/4 in. hex impact drivers with ONE-KEY feature POWERSTATE brushless motors that deliver up to 3，000 rpm and up to 1，800 in.-lbs. of fastening torque with constant power output under heavy load to drive screws faster. They are ONE-KEY compatible―the technology that allows you to connect wirelessly with a smart phone to customize， track， and manage the tool's performance and location. The app will track compatible tools within 100 ft. range of your phone and will remain trackable even if the battery is not charged or on the tool. Plus， the app will automatically keep records of the last time a tool was within range of the app， allowing you to pinpoint missing tools quicker and increase accountability of your crew. Milwaukee M18 FUEL 1/4 in. hex impact drivers are available individually (tool only) with belt clip and bit holder， or in kits that also include battery packs， charger， and carrying case.Additional features:* REDLINK PLUS Intelligence prevents damage to the tool and battery due to overloading or overheating* REDLITHIUM batteries deliver more work per charge and more work over the life of the battery* ONE-KEY also allows you to easily toggle between up to four custom performance profiles that can be saved to the memory of the tool; create predetermined setups for specific fasteners and materials or control output speed and power for a specific application at hand