The MILWAUKEE M18 FUEL 1/4 in Hex Impact Driver w/ One-Key is the MOST POWERFUL and FASTEST DRIVING impact driver, featuring ULTIMATE TRIGGER CONTROL. The POWERSTATE Brushless motor delivers unmatched power for a full range of capabilities to complete the widest variety of applications. Increase productivity on the jobsite with the fastest driving speed of any impact driver without sacrificing power or control. REDLINK PLUS intelligence delivers ULTIMATE TRIGGER CONTROL by providing smooth acceleration for small fasteners to prevent stripping of screws or damaging of materials. The M18 REDLITHIUM Battery Packs deliver more work per charge and more work over the life of the pack. The 4-mode drive control provides operators with greater control over output speed and power. The self-tapping screw mode provides faster installation time, shutting the hex driver down as soon as the fastener is seated to reduce damage to fasteners and materials. With ONE-KEY, you gain the ability to Customize, Track and Manage your impact driver. ONE-KEY technology also allows you to save up to 4 task settings directly to the tool. If your tool is ever lost or stolen, its tracking functionality can lock it out to protect your investment. This new impact driver also features Tri-LED lighting, illuminating the area of work while eliminating shadows. The M18 FUEL 1/4 in Hex Impact Driver is part of the M18 system which is fully compatible with over 250+ solutions.