Angle Grinder, Head Type Standard Head, Grip Style Barrel Grip, Voltage 18V DC, Wheel Diameter 4 1/2 in, 5 in, Brushless Motor Yes, Cordless Tool Kit Contents (1) Bare Tool, Safety Features Adjustable Guard, Anti-Restart Technology, Brake, Lock-Off Switch, Overload Protection, Switch Type Paddle, Lock-Off Switch Yes, Lock-On Switch No, Brake Type Electronic, Max. Speed 8,500 RPM, Minimum Speed 8,500 RPM, Spindle Thread Size 5/8 In.-11, Guard Adjustment Toolless Adjustable