-Off Tool, Wheel Diameter 3 in, Max. Speed 20,000 RPM, Switch Type Trigger, Brushless Motor Yes, Cordless Tool Kit Contents (1) Bare Tool, Arbor Hole Size 3/8 in, Maximum Wheel Thickness 1/8 in, Accessory Free Tool Change Yes, Lock-On Switch Yes, Lock-Off Switch No, -Off Wheel Orientation Right Angle, Handle Type Barrel Grip, Power Source Cordless, Voltage 12 V, Number of Batteries Included 0, Charger Included No, Tool Weight 1.5 lb, Overall Length 7 in