Quality Professional Product. Palm grip gives maximum comfort and control during sanding. Self Vacuum Random Orbital type as used in paint shops. Ideal for producing fine finishes. Low vibration, lightweight and ergonomic design. Allows cross grain sanding without swirl marks. Built in regulator for speed control. Rear exhaust. Orbit pattern: 4.8mm (3/16"). Free Speed: 9,000 rpm. Working Air Pressure: 90 PSI. Average Air Consumption: 12 Cfm. Air Inlet size 1/4". Air Hose size 3/8". Uses 127mm (5") hook and loop sanding discs.(Velcro type),