Makita XAG04Z 18V LXT® Lithium-Ion Brushless Cordless 4-1/2” / 5″ Cut-Off/Angle Grinder, Tool Only

Automatic Speed Change technology adjusts speed and torque during operation for optimum performance
Active Feedback-sensing Technology (AFT) turns the motor off if rotation of the wheel is suddenly forced to stop
The BL Brushless Motor eliminates carbon brushes, enabling the BL Motor to run cooler and more efficiently for longer life