The Bosch HDH181X 18-Volt Brute Tough Hammer Drill/Driver now features Active Response Technology, an industry first that reduces the risk of dangerous kickback during high torque applications without compromising performance. Active Response Technology uses electronic motor control to reduce the risk of harmful torque reactions in bind-up situations. An integrated acceleration sensor limits the tool’s rotation by detecting sudden movements and cutting off the motor to stop the tool. Feel more in control with the redesigned auxiliary handle. This handle is longer than previous versions and adjustable to 23 positions without having to remove it from the tool. A tongue-and-groove locking structure helps prevent slipping and increases control during use, while the 1/2-Inch metal chuck delivers a high clamping force. Tackle even the toughest drilling and driving applications with 750 in-lbs of torque from the 4-pole open frame motor. Select between 2 speeds and 25 clutch settings to optimize available torque for precise screw driving and improved drilling speed. Built to be Brute Tough, the HDH181X features exclusive Durashield housing and an all metal gearbox and is capable of surviving 25 drops from 12 feet high onto solid concrete. Bosch electronic motor and cell protection help prevent overheating and overloading – which extends tool life, runtime, and increases battery lifetime by more than 400%. For optimum results, pair this tool with Bosch’s next generation BAT620 4.0 Ah or BAT612 2.0 Ah 18-Volt lithium-ion batteries, which combine greater cell energy density for up to 65 percent longer runtime and advanced CoolPack technology for up to 100 percent more recharge-life. The HDH181X-01 includes two 18-Volt 4.0Ah batteries, a belt clip and a charger.