The Makita DTD155 LXT Impact Driver has a powerful brushless motor,electronically controlled to optimize battery energy use for up to 50% longer run time per charge.It offers 3 modes of operation:A-mode / hard mode / soft mode.A-mode feature helps eliminate 'screw cam-out' and 'cross threading' by driving at low speed until tightening begins.Fitted with anergonomically designed handle andLED job light with pre-glow and afterglow functions.Comes as a bare unit, no battery or charger supplied.Specifications:Bit Holder: 6.35mm (1/4in)No Load Speed: 0-1,300/0-3,000/min.Impact Rate: 0-1,600/0-3,900/bpmMax. Torque: 140NmStandard Bolt: M5-M14, High Tensile Bolt: M5-M12Weight: 1.2kg.