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 | Efficient BL Brushless motor is electronically controlled to optimize battery energy use for up to 50% longer run time per charge | The electronically-controlled BL Brushless Motor efficiently uses energy to match torque and RPM to the changing demands of the application