Patented technology silences the tool without sacrificing the power required for tough applications. 300 ft-lbs max power in reverse - that's best in class power performance. Enhanced power settings. Feather touch trigger and patented push button forward/reverse provide maximum control. FREE two-year limited warranty with tool registration The 2115QTiMAX delivers best in class performance for a tool less than six inches long and weighing less than two and a half pounds. The minimal size of this tool will allow greater access to tight spaces, while the minimal weight will reduce operator fatigue...all while still delivering MAX performance in a quiet tool. Free speed: 15,000 RPM, 1500 BPM, sound dBa: 93.2, minimum hose size; 3/8", average air consumption: 4 cfm.