The Milwaukee M18 ONEIWF38 ONE-KEY™ 3/8in Friction Ring Impact Wrench connects via Bluetooth™ with the Milwaukee® ONE-KEY™ app. Allows for complete tool customisation, allowing you to tune the tool to your needs. Configure to any application choosing optimum tool settings for repeatable precision. Save up to 4 custom settings to the tools memory for fast selection on the jobsite. Select from a range of application profiles or quickly create your own for perfect results on every trigger pull. ONE-KEY™ app also provides inventory function for total management of your complete tool/equipment fleet. Offers 4 modes of operation thanks to it's unique Milwaukee® DRIVE CONTROL™, which allows the user to shift into four different speed and torque settings to maximise application versatility. The 4 modes are: -Mode 1: For precision work. -Mode 2: Helps prevent damage to fasteners and material. -Mode 3: Delivers maximum performance for the toughest applications. -Mode 4: Intelligently detects when the tool has impacted on a fastener for one second automatically shutting the tool down, reducing overdriving and damaging materials. Mode 4: No Load Speed: 0-2,000/min, Impact Rate: 0-2,600, Torque: 0-120Nm. Specification Bit Holder: 3/8in Friction Ring. No Load Speed: 0-1,700/0-2,000/0-2,500/min. Impact Rate: 0-2,400/0-2,600/0-3,100/bpm. Torque: 40/120/300Nm.