Researched and Developed for Ultra-Fine Finishing. Flex-cover gives comfortable grip, prevents stiff fingers. Low Profile, vibration-free motor ensures full contact sanding. Unique Air Efficiency System. Positive-Action Drive supported by 4-special bearings generates more power on less air. Over-size Drive Head eliminates pad-wobble for full contact Sanding. New positive air-control valve. Built-in pad release feature.; RPM: 10000+; Wt: 3lbs. 5oz.; Air Consumption: 9.8 cfm @ 90 PSI; Noise Level: 79 dBa