14,000 OPM for faster and smooth finish sanding. Precision engineered all-ball bearing construction for reduced vibration and noise. Contoured, rubberized palm grip design for improved operator comfort. Large clamping lever for quick and easy paper installation. Efficient through-the-pad dust collection system for a cleaner work environment. Conveniently located on/off switch for easy one-handed operation. Rubber-sealed switch prevents dust contamination for longer tool life. Aluminum cast shoe base for increased durability. Double insulated.