Features and Benefits:OUTPOWER: Makita-built motor delivers 465 ft.lbs. of Nut-Busting Torque and 260 ft.lbs. of Fastening Torque;OUTSMART: 3 forward and 3 reverse Auto-Stop modes for increased efficiency;OUTLAST: XPT™ is engineered to provide increased dust and water resistance in harsh job site conditions;4-speed power selection switch (0-1,000 / 0-1,800 / 0-2,600 / 0-3,200 RPM & 0-1,800 / 0-2,600 / 0-3,400 / 0-4,000 IPM) for a wide range of applications;Full speed mode function reduces trigger pull to reach full speed;Compact length at only 5-5/8";ideal for working in tight spaces;Ultra-smooth variable speed trigger provides optimum control;Reinforced gear housing engineered for maximum job site durability;The digital communication within XGT® optimizes performance to provide up to 2X longer sustained power under heavy-load applications;The digital communication within XGT® actively monitors and protects against overload, over-discharge and overheating;XGT® Tools and Batteries are designed with a multi-layer contact interface for more constant power delivery to take on high-current demands;XGT® Batteries feature rigid rails with impact-resistant construction to secure the battery to the tool during high-demand applications (batteries not included);The XGT® Rapid Charger with dual-fan design circulates air through the battery to cool the battery and circuit board quickly for faster charging (charger not included);The XGT® Rapid Charger�s digital display indicates battery charge level (-80%, +80%, 100%);The XGT® Rapid Charger�s built-in chip thoroughly communicates during the charging process to control current, voltage, and temperature for more efficient charging;The 40V max XGT® Brushless Cordless 4-Speed 1/2" Sq. Drive Impact Wrench Kit w/ Friction Ring Anvil (GWT04Z, tool only) provides improved fastening control, ideal for automotive, installation, and fabrication trades. The Makita-built brushless motor delivers 465 ft.lbs. of Nut-Busting Torque and 260 ft.lbs. of Fastening Torque to out-power similar impact wrenches in heavy-load applications.Precise fastening control is achieved through the 4-speed power selection switch, which accounts for a wide range of applications. Three forward and three reverse rotation auto-stop modes offer increased efficiency when fastener is adequately loosened. The full-speed mode function reduces the trigger pull to reach full speed.The GWT04Z features Makita's Extreme Protection Technology (XPT™), a series of protective seals inside the tool. It is designed to improve a tool�s operation in harsh conditions by channeling water and dust from key internal components. Reinforced gear housing provides additional durability on the job site.XGT is a system of equipment, tools, batteries and chargers utilizing 40v max lithium-ion batteries. XGT is engineered to deliver high power to take on high-demand applications, allowing users to completely transition to a cordless job site. XGT is equipped with advanced brushless motor engineering, intelligent digital communication, and superior durability features to outpower, outsmart and outlast the competition.