Features: 54V Brushless motor enables improved performance in demanding applications, Electronic Brake stops the wheel quickly when the trigger is disengaged, E-Clutch activates in less than a tenth of a second when a pinch/stall is detected; shutting down the motor, A mesh cover over air intake vents restricts dust being sucked through the motor, Rubber over mold provides enhanced grip and comfort, Recessed spindle lock design allows max depth of cut and greater protection to button when using in confined spaces, 9,000 RPM Speed allows the use of up to 6? wheels. Specifications: Max Watts Out: 1700W, Wheel Diameter: 125 mm, Spindle Thread: M14, No Load Speed: 9000 rpm, Length: 400 mm, Height: 125 mm, Weight: 3.0 kg, Hand/Arm Vibration Grinding: 5.9 m/s2, Horse Power: 2.2.