Abstract: An oscillating sanding device includes a casing to be held in the hand and a sanding table supported below the casing by resilient columns. The sanding table includes a cylindrical ring within which fits a rotor smaller than the ring and mounted to turn within the ring. The rotor is unbalanced and is provided with projecting blades through which it can be driven by pressure fluid supplied through a valve in the casing. The valve can be opened by a pushbutton located on top of the casing.