Porter Cable 6" Variable Speed Random Orbit Dual Action Polisher/Sander. Powerful 4 Amp motor runs at 2,500-6,000 OPM. The ergonomically-designed handle helps to increase leverage and also promotes a comfortable position for sanding. Dual action motion means that the sander does not leave swirl marks. Measures 11 x 10.5 x 6 inches (LxWxH) and weighs 5.75 pounds.