20-Volt MAX Li-Ion Cordless 4-1/2 in. Angle Grinder(Tool-Only) w/ 20V 1-1/2 in. Die Grinder(Tool-Only) & 20V Battery 5AhThe 20 Volt MAX XR Angle Grinder features a brake, E Clutch System, and Kickback Brake. The brake quickly brings the wheel to a stop in 2 seconds or less when the trigger is released. The E Clutch System automatically shuts down the motor when a wheel pinch in detected. These 2 features working together to shut the tool down without user interaction, called the Kickback Brake. Additionally, the grinder features a 1 Touch Guard, which allows for single