Max XR® Brushless Switch Small Angle Grinder Kit, 4-1/2" -5" Wheel, 20 VPower Detect tools maximize your performance with high capacity XR batteries 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 Clutch System activates in less than a tenth of a second when a pinch stall is detected, shutting down the motor E Switch Protection requires the trigger switch to be cycled (turned off and then on) in the