Features: 

• Power Detect tools maximize your performance with high-capacity XR® batteries
  
• E-Clutch® System activates in less than a tenth of a second when a pinch/stall is detected, shutting down the motor
  
• Kickback Brake engages with maximum force to quickly stop the wheel and shut off the grinder when a pinch, stall, or bind-up occurs to reduce the risk of damage or injury
  
• E-Switch Protection™ requires the trigger switch to be cycled (turned off and then on) in the event of a power outage or other unexpected shut down) to restart tool.
  
• Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18.
  
• DEWALT 20V MAX XR 4 1/2-5" Small Angle Grinder BRUSHLESS with Power Detect Tool Technology Bare Tool.

Details: 

The DEWALT 20 Volt Max XR® cordless angle grinder features POWER DETECT™ tool technology to maximize performance with high-capacity XR® batteries. The brushless motor delivers 1350 max Watts out and up to 9000 RPM speed. This paddle switch angle grinder is part of the PERFORM and PROTECT™ product line with kickback brake and the E-CLUTCH® System. Kickback brake engages with maximum force to quickly stop the wheel and shut off the grinder when a pinch, stall or bind-up occurs to reduce the risk of damage or injury. The E-Clutch® system activates in less than a tenth of a second when a pinch/stall is detected, thus shutting down the motor. E-Switch Protection™ requires the trigger switch to be cycled that is turned-off and then on, in the event of a power outage or other unexpected shut down to restart tool.