Makita DGA454Z Brushless 4-1/2" Angle Grinder Cordless 18V LXT18V LXT Brushless 4 1 2" Angle Grinder w Thumb Switch, Tool Only High Performance And Efficiency For Heavy Duty Grinding Applications Thumb Switch with Lock On Automatic torque Drive Technology (ADT) feature adjusts the torque and speed according to the load condition, enabling rapid movement between high speed and high torque applications eXtreme Protection Technology (XPT) offers maximum protection against dust, debris and liquids for optimal