DEWALT 9-in Trigger Switch Corded Angle GrinderAnti Rotation E CLUTCH System activates in less than a tenth of a second when a pinch stall is detected, shutting down the motor Anti vibe side handle reduces the users exposure to vibration Power Loss Reset and reg; prevents accidental re starts following a power disruption when the tool is left in the "on" position Power Off advanced electronic overload protection shuts the tool off before it reaches overload or burn up Dust Ejection System