professional air sander -- compact 5inch air random orbital sander is easy to handle in palm; integrade body design provides durability and lightweight, premium quality housing wear resistant, high strength, long service life. stable performance -- built-in regulator for free speed: 11,000 revolutions per minute, good helper for long lasting service in different operation area. you can start your grinding work confidently no matter what. ergonomic design -- the plastics is light in weight, high in balance, and does not cause fatigue and high stability during use. high efficiency -- the trigger pressure speed controls the free speed of the gear. low air consumption for long hours of work. scope of application -- ideal for producing fine finishes on wood, metal, fiberglass and other compound materials, etc. providing high-quality finish in auto body and woodworking.